Family: de Ros, Sir William I / FitzPiers, Lucy (F13420)
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FitzHerbert, Sir Piers (1163-1235)
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FitzRobert, Alice (1185-1225)
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| de Ros, Sir William I (1192-1264) |
| FitzPiers, Lucy (1207-1266)
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de Ros, William II (1244-1310)  |