Robert d'Avenel
- 1185(
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- 1 Robert d'Avenel [1] d. 8 Mar 1185
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- 2 Isabel d'Avenel [1.1]
- William "The Lion" I, King of Scots William "The Lion"
- 3 Isabel MacWilliam [1.1.1]
- Robert de Roos b. Abt 1170 d. 1227
- 4 Sir William de Roos, of Helmesley [1.1.1.1] b. Bef 1200 d. Between 1258 and 1264
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- 4 Sir William de Roos, of Helmesley [1.1.1.1]
- 3 Isabel MacWilliam [1.1.1]
- 2 Isabel d'Avenel [1.1]