1072–22 August 1139), and maternal grandson of Thor, Lord of Crawford.
1060, d. Alnwick, 13 November 1093), and wife Margaret de Drymen (b.
1169, d. 1259), married to Ada of Lennox, daughter of Maol Domhnaich, Earl of Lennox, and wife Elizabeth or Beatrix Stewart, and Roderick Drummond (b. Drymen, abt.
William inherited half moiety of the barony of Cavendish, Suffolk, through his wife Alice or Aleanora, as heiress to her nephew Hugh de Limési or de Limesay.
In 1164 his father William, jure uxoris 1st Lord of Crawford, sat in the Scottish Parliament as Baron of Luffness.