Children |
| 1. Henry Fitzwilliam Of Galightly, b. Abt 1160, Scotland, United Kingdom d. Yes, date unknown |
| 2. Princess Ada Fitzwilliam, Of Scotland, b. Jan 1164, Huntingdon, Huntingdonshire, England d. 11 Jan 1204, Dunbar, East Lothian, Scotland (Age ~ 39 years) |
| 3. Isabel MacWilliam Of Scotland, b. 1165, Dunfermline, Fifeshire, Scotland d. 1196, Scotland (Age 31 years) |
| 4. Robert Fitzwilliam, Of London, b. 1166, London, Middlesex, Englalnd d. 31 Mar 1280, Lochmaben, Dumfriesshire, Scotland (Age 114 years) |
| 5. Margaret, Of Scotland Countess Of Kent, b. 1193, Haddington, Haddingtonshire, Scotland d. 1259 (Age 66 years) |
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