Lord William Sinclair 4th Lord of Roslin
- Born: Abt 1145, Roslin, Midlothian, Scotland
- Marriage (1): Alice de Dunbar about 1168 in Midlothian, Scotland
- Marriage (2): Amicia de Roskelyn
- Died: 1214, Roslin, Midlothian, Scotland aged about 69
- Buried: 1214, Roslin, Midlothian, Scotland
FamilySearch ID: G63K-Y51.
William married Alice de Dunbar about 1168 in Midlothian, Scotland. (Alice de Dunbar was born in 1145 in Dunbar, Haddingtonshire, Scotland and died in 1200 in Roslin, Midlothian, Scotland.)
William next married Amicia de Roskelyn. (Amicia de Roskelyn was born before 1217 in Scotland.)
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