Sir William Sinclair, heir to Henry, and his brother John were among the Scots killed at the Battle of Teba (1330).
The Sinclairs of Lybster have long roots running back to the Sinclair earls who ruled Caithness that was once a much larger area taking in much of Sutherland.
William Saint Clair of Roslin, 21st Baron of Roslin (died 1778) was a member of the Clan Sinclair.
Upton Sinclair | Wu-Tang Clan | Sinclair Lewis | clan | Tokugawa clan | Shimazu clan | Clan Mackay | Taira clan | Sinclair | Clan Cameron | Minamoto clan | Iain Sinclair | Scottish clan chief | Scottish clan | Clan Sweeney | Satake clan | Oda clan | Hōjō clan | Fujiwara clan | Clan Ross | Clan Murray | Asakura clan | Uesugi clan | Sinclair Broadcast Group | Mōri clan | Keith Sinclair | John Sinclair | Clive Sinclair | Clan Donald | Clan |