He was the grandson of Henry Sinclair, 1st Earl of Orkney and son of Henry Sinclair, 2nd Earl of Orkney, for a time protector of the young James Stewart, the later James I of Scotland.
He was the grandson of Henry Sinclair. This was for a time protector of the young James Stewart. He was 1st Earl of Orkney. This was for a time protector of the young James Stewart. He was son of Henry Sinclair the later James I of Scotland. This was for a time protector of the young James Stewart. Henry Sinclair was 2nd Earl of Orkney.