Henry Sinclair was the son and heir of William Sinclair, Lord of Roslin, and his wife Isobel of Strathearn, a daughter of Maol Ísa, Earl of Orkney.
Henry Sinclair was the son and heir of William Sinclair. Henry Sinclair was Lord of Roslin. Henry Sinclair was his wife Isobel of Strathearn Earl of Orkney. Strathearn was a daughter of Maol Ísa.