*William Sinclair (St. Clair) Lord of Rosslyn
born after 1309
died after 17 September 1358

father:
*William "the Crusader" Sinclair Lord of Rosslyn
died 25 August 1330 Andalusia, Spain

mother:
unknown

siblings:
unknown

spouse:
*Isabella Strathearn
born about 1317

children:
*Margaret St. Clair (Sinclair) born about 1336 Scotland died Scotland
Henry Sinclair 1st Earl (Prince) of Orkney born about 1335 Rosslin, Midlothian, Scotland
died 1404 Battle of Orkney

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com