Other Events and Attributes:

• FSID: G8S8-5WP

Family/Spouse: Frasach, Dungan. Dungan (son of Frasach, Gruagan Druagain O'Neill) was born in 820 in Northern Ireland; died in DECEASED in Northern Ireland. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Nickname: The Battler
• FSID: G8S8-549

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Appointments / Titles: King of Keenaught
• Appointments / Titles: King of Southern Ulster
• FSID: KLXD-RSX

Notes:

Listed no: 101, the son of Cathusach in O'Hart's Princes of Limavady (county Londonderry, Northern Ireland)

Sources
Library Ireland : O'Cahan; Princes of Limavady
Library Ireland : Ó Catháin

https://www.wikitree.com/wiki/Buchanan-1508

Family/Spouse: Flaitheartach, Lady N.N.. N.N. was born in 920 in Northern Ireland; died in 1000 in Northern Ireland. [Group Sheet] [Family Chart]

Other Events and Attributes:

• FSID: LDRX-MR9

Notes:

Conn Ciconntach O'Cahan, the first to assume the family name of O'Cahan as a surname. [1] [2]

The Ó Catháin, meaning "descendants of Cahan", were a sept of the Cenél nEógain branch of the Northern Uí Néill [3]

The first known O'Ceanns held a family seat in Derry, Ulster, Ireland from at least the 10th. century. The great variety in spellings of this family name include - Cain, Caine, Kane, Cahan, O'Cahan, Kean, Keane, O'Keane, Ceane, Cean, Kahan, O'Kean, O'Kane, O'Kaine, Kaine, Keann, Cainn, Cainne, Kainne, Kainn, Cahann, O'Cain and many others. [4]

Conn Cionntach* O'Cahan: son of Dermod ; first assumed this surname ; had a brother named Annselan, who was the ancestor of O'Bocainain (" hocain :" Irish, fairies; "an," one who), anglicised Buchanan. This Annselan was the first of the family who settled in Scotland.[5] Irish Pedigrees: Or, The Origin and Stem of the Irish Nation, Volume 1 By John O'Hart

Sources
↑ Irish Pedigrees: Or, The Origin and Stem of the Irish Nation, Volume 1 By John O'Hart
↑ Giollachriosd was the son of Conn Cionntach O'Cahan: son of Dermod; first assumed this sirname; had a brother named Annselan, who was the ancestor of O'Bocainain ("bocain:" Irish, fairies; "an," one who), anglicised Buchanan. This Annselan was the first of the family who settled in Scotland. Library Ireland : Princes of Limavady, County Londonderry
↑ Ó Catháin
↑ Wikipedia : O'Ceann
↑ Irish Pedigrees: Or, The Origin and Stem of the Irish Nation, Volume 1 By John O'Hart[1]
O'Cahans, Princes of Ulster : Rise to Power
Cionntach: From this name ("cionntach:" Irish, guilty) some derive Mac Cionntaigh, anglicised Maginty and Ginty.

https://www.wikitree.com/wiki/O'Cahan-12

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• House: Clan of The Ó Catháin - a sept of the Cenél nEógain branch of the Northern Uí Néill
• FSID: LTZH-KYK
• Residence: Limavidy, Londonderry, Northern Ireland

Notes:

Biography
Giollachriosd (Gilchrist) was a son of Conn Ciconntach O'Cahan, the first to assume the family name of O'Cahan as a surname. [1]

The Ó Catháin, meaning "descendants of Cahan", were a sept of the Cenél nEógain branch of the Northern Uí Néill [2]

The first known O'Ceanns held a family seat in Derry, Ulster, Ireland from at least the 10th. century. The great variety in spellings of this family name include - Cain, Caine, Kane, Cahan, O'Cahan, Kean, Keane, O'Keane, Ceane, Cean, Kahan, O'Kean, O'Kane, O'Kaine, Kaine, Keann, Cainn, Cainne, Kainne, Kainn, Cahann, O'Cain and many others. [3]

Sources
↑ Giollachriosd was the son of Conn Cionntach O'Cahan: son of Dermod; first assumed this sirname; had a brother named Annselan, who was the ancestor of O'Bocainain ("bocain:" Irish, fairies; "an," one who), anglicised Buchanan. This Annselan was the first of the family who settled in Scotland. Library Ireland : Princes of Limavady, County Londonderry
↑ Ó Catháin
↑ Wikipedia : O'Ceann
See also:

O'Cahans, Princes of Ulster : Rise to Power
Irish Pedigrees: Or, The Origin and Stem of the Irish Nation, Volume 1 by John O'Hart, https://books.google.com/books?id=2icbAAAAYAAJ&pg=PA623&lpg=PA623&dq=~genealogy+Giollachriosd+O%27Cahan+Limavady,+Ulster,+Ireland&source=bl&ots=XWGrQBW0Vu&sig=ACfU3U0ANbVjn_z65V3OjlgAdWwXpBHYCg&hl=en&sa=X&ved=2ahUKEwiCruif9ZHiAhVPKawKHZ0TA24Q6AEwBnoECBIQAQ#v=onepage&q=~genealogy%20Giollachriosd%20O'Cahan%20Limavady%2C%20Ulster%2C%20Ireland&f=false

https://www.wikitree.com/wiki/O'Cahan-5

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• House: Clan of The Ó Catháin - a sept of the Cenél nEógain branch of the Northern Uí Néill
• FSID: 9CXH-FVH
• Residence: Limavidy, Londonderry, Northern Ireland

Notes:

IO-Clery gives the ancestry of Sir Donnell O'Cahan from Owen and Niall of the Nine Hostages as follows-:
... Domnall ballach
m Ruaidri m Maghnusa
m Donnchada an einigh
m Seaain
m Aiberne
m Diarmada
m Con mhuighe
m Diarmada
m Con muighe na nGall
m Magnusa chatha duin
m Ruaidri m Domhnaill
m Eachmharcaigh
m Raghnaill
m Iomhair
m Gilla Crist
m Concionaedh
m Diermada
m Cathusaigh
m Cathain (a quo h Chathain)
m Drugain
m Concobhair
m Fergail
m Maile duin
m Maile fithrigh
m Aedha uairiodhnaigh
m Downaill ilcealccaigh
m Muircertaigh
m Muirethaigh
m Eogain
m Neill noigiallaigh.
(Analecta Hlbernica i 8).

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Appointments / Titles: Lord of the Craebh, Cianachta, and Fir-Li
• Appointments / Titles: Lord of the Creeve, Coleraine and Keenaght
• House: Clan of The Ó Catháin - a sept of the Cenél nEógain branch of the Northern Uí Néill
• FSID: 9CXH-FV6
• Residence: Limavidy, Londonderry, Northern Ireland
• Military: 1138; Fell through treachery and guile, by the Ui-Eoghain of the Valley

Notes:

Raghnaill (Ranall) was a son of Iomhar O'Cahan M1138.6 Raghnall, son of Imhar Ua Cathain, lord of the Craebh, Cianachta, and Fir- Li, fell through treachery and guile, by the Ui-Eoghain of the Valley.' Annals of the Four Masters, 1138

The valley people are evidently Clan Binny, and the O'Cahan killed ushers the O'Cahan clan into a stormy future that occupies a large place in Ulster history for the next five and a half centuries. This is the first mention of the O'Cahans in the Annals, and it is perhaps appropriate that their coming was preceded by a great storm in the previous year. By 1138 they are obviously masters not only of the Creeve, but also of Cianachta and Fir-Li.

Iomhar O'Cahan Added By Merryl Hunkin; 19 August 2018
This person was created through the import of Sheppard_Duncan_Bickham_Stroud.ged on 01 February 2011.
Raghnaill Mac Iomhair O'CATHAIN Sex: M Birth: ABT 1100 Death: 1138 in Ireland

Sources
↑ Library Ireland : Princes of Limavady, County Londonderry
↑ https://celt.ucc.ie/published/T100005B.html
↑ https://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=thamm&id=I155999

https://www.wikitree.com/wiki/O'Cathain-6

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• House: Clan of The Ó Catháin - a sept of the Cenél nEógain branch of the Northern Uí Néill
• FSID: GQMZ-4QZ
• Residence: Limavidy, Londonderry, Northern Ireland
• Military: 1175; The Kinel Enda were defeated in battle with much slaughter - by O'Cahan and Neill O'Gormley
• Military: 1181; Assembled an army of the men of Magh-Ith and of Kinel Binnigh of the Glenn - and crossed the Tuaim on the River Bann.
• Military: 1181; They plundered Fir-Lee and Hy-Tuirtre and took an immense prey of cattle.

Notes:

1175. The Kinel Enda were defeated and a great slaughter made of them by Eachmarcach O'Kane and Niall O'Gormley. (The territory of Enda was thirty quarterlands south of Inishowen. As already mentioned, the Gormleys were the leading sept of Clan Moen, and settled to the east and north-east of Strabane.)

1178. Randal, the son of Eachmarcach O'Kane, had been slain by the Kinel-Moen in the beginning of this summer. (Eachmarcach was the chief of the O'Cahans or O'Kanes at this period. Evidently the pact with Clan Moen was of a very temporary duration; this clan bordered on that section of Clan Connor Magh Ithe, known as the Clan Dermot, whose lands were north of theirs.)

The foregoing entries show the O'Cahans taking an active part in the tribal conflicts during the half-century or so which followed their expansion into the districts of Creeve and Cianachta. By the time of the last entry a new factor had entered Ulster history which was to exercise a continuing influence for two centuries on the area and clans in which we are particularly interested. This was the coming of the Normans.

1181. Eachmarcach O'Cahan already mentioned, with the men of Magh Ithe and the Clan Binny of the Valley (the latter evidently now Subordinate to the O'Cahans) mustered an army and crossed the Bann at Toome. They plundered all the territories of the Fir Li and Hy Tuirtre, and carried off many thousands of cows. At this point Fir Li as a state disappears from the Annals, and this is also the last appearance of the Clan Binny, who had first emerged in the Annals a century and a half previously. Cumee O'Flynn was killed by the Normans a few years afterwards, and Ui Tuirtre became a subordinate territory with an O'Flynn chief owning the Normans as overlords.

Family/Spouse: MacErc, Meardda. Meardda was born in 1123 in Ireland; died in DECEASED in Ireland. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Appointments / Titles: King of Formaeil
• FSID: M8KR-8KR

Notes:

Clan of The Ó Catháin - a sept of the Cenél nEógain branch of the Northern Uí Néill

Family/Spouse: Unknown. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Appointments / Titles: King of Formaeil
• FSID: M8KR-8X9

Notes:

The Life Summary of Rory
King Rory O'Cathain of Formaeil was born in 1175, in Ulster, Ireland as the son of King Donal Of Formaeil Cathain. He married Queen of Formaeil O'Cathain about 1195, in Ireland. They were the parents of at least 1 son. He died in his hometown.

https://ancestors.familysearch.org/en/G3M7-RCP/king-rory-o%27cathain-of-formaeil-1175

Rory married O'Cathain, Queen of Formaeil in 1195 in Ireland. Queen was born in 1175 in Ireland; died in DECEASED in Ireland. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Appointments / Titles: Limavidy, Londonderry, Northern Ireland; Prince of Limavadi
• Nickname: Yellow Haired
• FSID: GF1N-DXJ

Notes:

Magonius or Magnus O'Cahan Prince Of Limavady.

Manus Catha an Duin was a son of Rory Raudria O'Cathain [1][2] He was a prince of Limavady, killed by the English in the Battle of Down (Druim Dearg) in 1260.

He died in the year 1260 in Slain At Battle Of, Down, Ireland, he was 60 years old. The Battle of Druim Dearg, also known as the Battle of Down, took place on or about 14 May 1260 near Downpatrick, in modern-day County Down, Northern Ireland. [3]
Hence the epithet Catha an Duin MacNamee laments the loss of Magnus O'Cathain as being the most grievous after that of O'Neill himself.

Lament of the O'Cathain Loss

"Bitter to my heart (to see) the grey Galls Triumphing over the slaughtered Maghnus; That the head of O'Cathain, attracting no notice, Should be seen on the bridge of Dun.

At night did Maghnus of Macha remain Between wounded bodies; If Brian had not been in the slaughter There would be no loss like O'Cathain.

Maghnus himself, Eachmarcach too, Muircheartach, Dounchadh, Domhnall, And Niall O'Cathain all falling with wounds: Alas, it was not one loss only.

A misfortune to our children and our wives Was the slaying of Maghnus O'Cathain: That scion of Inbhear-Abhaigh never neglected A son or a daughter of Eoghan's race."[4]

Magnus married O'Cathain, Formaiel in 1240 in Northern Ireland. Formaiel was born in 1200 in Limavidy, Londonderry, Northern Ireland; died in 1260 in Northern Ireland; was buried in 1260 in Limavidy, Londonderry, Northern Ireland. [Group Sheet] [Family Chart]

Other Events and Attributes:

• Death: Northern Ireland
• Appointments / Titles: Chief of the O'Cahan of Keenaght, Fir-na-Creeve and Fir Lee
• Appointments / Titles: King of Ciannachta ... King of Keenaght
• FSID: L14D-DGL
• Military: 1264; Taken prisoner by Aedh the Tawny.

Notes:

Cumee na Gall O'Cahan (Irish: Cú Maighe na nGall Ó Catháin) was a chief of the O'Cahan of Keenaght, Fir-na-Creeve and Fir Lee in modern-day County Londonderry, Northern Ireland. The family first appears on record in 1138. Cumee was a son of Manus O'Cahan, a man who fell in battle alongside fourteen other members of the O'Cahan in support of Brian O'Neill, king of Tír Eoghain, at the battle of Druim Dearg.

Following his father's death, Cumee was made chief of his kindred by Henry de Mandeville, seneschal of Ulster, and thereupon served as an ally to this Anglo-Irish lord. His ties with the Normans earned him the epithet of na nGall meaning "of the foreigners".

Cumee's son, Dermot, appears on record in 1312. Cumee's daughter, Anna (Áine), married Angus Og MacDonald. A heavily restored effigy at Dungiven Priory is sometimes associated with Cumee, although it appears to date to the last quarter of the fifteenth century, and seems to be that of a later member of the kindred: perhaps either Godfrey (Gofraidh, died 1472), Dermot (Diarmait, died 1484), Godfrey (Gofraidh, died 1492), or Owen (Eóin, died 1492).
__________________________________________________

Magonius or Magnus O'Cahan Prince Of Limavady.

Manus Catha an Duin was a son of Rory Raudria O'Cathain [1][2] He was a prince of Limavady, killed by the English in the Battle of Down (Druim Dearg) in 1260.

He died in the year 1260 in Slain At Battle Of, Down, Ireland, he was 60 years old. The Battle of Druim Dearg, also known as the Battle of Down, took place on or about 14 May 1260 near Downpatrick, in modern-day County Down, Northern Ireland. [3]
Hence the epithet Catha an Duin MacNamee laments the loss of Magnus O'Cathain as being the most grievous after that of O'Neill himself.

Lament of the O'Cathain Loss

"Bitter to my heart (to see) the grey Galls Triumphing over the slaughtered Maghnus; That the head of O'Cathain, attracting no notice, Should be seen on the bridge of Dun.

At night did Maghnus of Macha remain Between wounded bodies; If Brian had not been in the slaughter There would be no loss like O'Cathain.

Maghnus himself, Eachmarcach too, Muircheartach, Dounchadh, Domhnall, And Niall O'Cathain all falling with wounds: Alas, it was not one loss only.

A misfortune to our children and our wives Was the slaying of Maghnus O'Cathain: That scion of Inbhear-Abhaigh never neglected A son or a daughter of Eoghan's race."[4]

Sources
↑ [1]
↑ Library Ireland : Princes of Limavady, County Londonderry
↑ https://www.wikiwand.com/en/Battle_of_Druim_Dearg
↑ http://ulsterman3.tripod.com/Battle_of_Down.htm
O'Cahan's Princes : Battle of Down
Magnus `Yellow-haired' (OCHAAN) O'CATHAIN
https://fabpedigree.com/s024/f350145.htm
Magnus `Yellow-haired' (OCHAAN) O'CATHAIN, Prince de LIMAVADY, D'Irlande
https://gw.geneanet.org/foullon?lang=en&pz=matheline+marie+herminia&nz=foullon&ocz=0&p=magnus+yellow+haired+ochaan+o+cathain+prince+de+limavady&n=d+irlande
Prince Magnus O'Cahan 1200–1260
https://ancestors.familysearch.org/en/LBRQ-SRQ/prince-magnus-o%27cahan-1200-1260

King of Keenaght a barony in County Londonderry
Below is a list of civil parishes in Keenaght:[13]

Aghanloo
Balteagh
Banagher (split with barony of Tirkeeran)
Bovevagh
Carrick
Drumachose
Dungiven
Magilligan (also known as Tamlaghtard)
Tamlaght Finlagan

Family/Spouse: O'Cathain, Aonghas of Islay. Aonghas was born in 1225 in Scotland; died in DECEASED. [Group Sheet] [Family Chart]