Henry II Sinclair Earl of Orkney (1375–1420) Parents Jane Halyburton Henry I Sinclair, Earl of Orkney Children William Sinclair, 1st Earl of Caithness Beatrice Sinclair Siblings Jean Sinclair Elizabeth Sinclair Lady Mairi|Marjory Sinclair Beatrice Sinclair Margaret Sinclair Helen Sinclair William Sinclair, 1st of Dryden Partners Egidia Douglas