The origins of William are uncertain, the first of the name of Douglas to appear on historic record. He appears as witness to a charter of Jocelin, Bishop of Glasgow in 1174 in favour of the monks of Kelso Abbey, at which time he was in possession of the Lands of Douglas.Liber de Calchou, p346 It seems he was the son of Theobald le Fleming (born 1120, Aldingham Manor, Lancashire, England died 1193, Douglasdale, Midlothian, Scotland) and his wife, the sister of Freskin de Kersdale (of Moray).
