William Sinclair, 2nd Earl of Caithness [SEP] date of death
William Sinclair, 2nd Earl of Caithness
William Sinclair, 2nd Earl of Caithness (1459 – 9 September 1513) was a Scottish nobleman
Life.
Lord Caithness was born at Ravenscraig Castle, Kirkcaldy, Scotland second son to William Sinclair, 1st Earl of Caithness and Marjory Sutherland. 
He married Margaret Keith, daughter of Sir Gilbert Keith of Inverugie. 
He fought and died in the Battle of Flodden.
Issue.
By Margaret Keith, Lord Caithness had two children: 
- John Sinclair, 3rd
son from his second marriage to Marjory Sutherland, who was also named William Sinclair (d. 1513) (who became the second Earl of Caithness). However, Lord Caithness was succeeded in the lordship of Sinclair by his eldest son William Sinclair, 2nd Lord Sinclair. The latter's son Henry, the third Lord, was confirmed in the title in 1488.
On the death of his great-great-great-grandson, the ninth Lord, the male line of the second Lord failed. He was succeeded by