From Wikipedia, the free encyclopedia.
William Sinclair, 1st Earl of Caithness, 3rd Earl of Orkney, Baron of Roslin (1410-1484) was a Scottish nobleman and the builder Rosslyn Chapel. He was the grandson of Scottish explorer Henry Sinclair, 1st Earl of Orkney.
{| border="2" align="center"
|-
|width="30%" align="center"|Preceded by:
Henry Sinclair
|width="40%" align="center"|Earl of Orkney
|width="30%" align="center"|Followed by:
Surrendered
|-
|width="30%" align="center"|Preceded by:
New Creation
|width="40%" align="center"|Earl of Caithness
|width="30%" align="center"|Followed by:
William Sinclair
|}
