House of Sinclair Lords and Barons of Roslin Ancient arms
House of Sinclair Earls of Orkney Lords of Roslin
House of Sinclair Earls of Caithness Lords Berriedale
Additional Arms
House of Sinclair as Earls of Orkney
House of Sinclair as Earls of Caithness
Cadet Branches
House Sinclair of Ravenscraig Lords Sinclair Lords of Ravenscraig, Dysart, Newburgh and Kirkwall Issued from son of 1st Earl of Caithness from his 1st marriage (disinherited)
House Sinclair of Roslin Lords and Barons of Roslin Issued from younger son of 1st Earl of Caithness from his 2nd marriage
Personal Arms
William Sinclair 2nd Earl of Caithness Eldest son of 1st Earl of Caithness from his 1st marriage Alternative arms variant