Henry I Sinclair, Earl of Orkney Scottish and Norwegian nobleman (1345–1400) Parents Isabel of Strathearn William St Clair, 8th Baron of Roslin Children Elizabeth Sinclair Lady Mairi|Marjory Sinclair Jean Sinclair William Sinclair, 1st of Dryden Margaret Sinclair Beatrice Sinclair Henry II Sinclair Helen Sinclair Partners Jane Halyburton
