of Friesland, Dietrich II
- 988(
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- 1 of Friesland, Dietrich II [1] d. 6 May 988
- van Vlaanderen, Hildegard b. 934 d. 10 Apr 990
- 2 of Holland, Arnulf [1.1] b. 952 d. 18 Sep 993
- Luxembourg, Liutgard of b. 955 d. 14 May 1005
- 3 of Holland, Adelina [1.1.1] b. 987 d. 20 Nov 1052
- de Boulogne, Baudouin II b. 990 d. 1033
- 4 de Boulogne, Eustace I [1.1.1.1] b. 11 Aug 989 d. 4 Oct 1049
[ =>]
- 4 de Boulogne, Eustace I [1.1.1.1]
- 3 of Holland, Adelina [1.1.1]
- 2 of Holland, Arnulf [1.1]