See also
1. Lord William Sinclair, 3rd Earl of Orkney 3rd Earl Orkney, 1st Earl Caithness, son of Henry Sinclair, 2nd Earl of ORKNEY (c. 1375-1422) and Egidia DOUGLAS ( - ), was born before [Julian] February 1420. He had the title '3rd Earl Orkney, 1st Earl Caithness'. He had the title '3rd Earl Orkney, 1st Earl Caithness, 1st Lord Sinclair, Chancellor'. He died between 1476 and 1482. He died in 1480. He married Elizabeth DOUGLAS. He married Marjory SUTHERLAND.
Elizabeth DOUGLAS, daughter of Earl Archibald DOUGLAS (c. 1370-1424) and Lady Margaret STEWART Lady of Galloway (aft1367-bef1456), was born between 1385 and 1401. She died before 1451. She and William Sinclair, 3rd Earl of Orkney had the following children:
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Marjory SUTHERLAND and William Sinclair, 3rd Earl of Orkney had the following children:
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2. Lord William Sinclair, 2nd Lord Sinclair 2nd Lord Sinclair, son of Lord William Sinclair, 3rd Earl of Orkney 3rd Earl Orkney, 1st Earl Caithness and Elizabeth DOUGLAS, was born before 1403. He had the title '2nd Lord Sinclair'. He died on [Julian] 14 July 1487. He married Christina LESLIE.
William "The Waster" was disinherited by his father.
Christina LESLIE was the daughter of Earl George LESLIE (bef1417-c. 1489) and Christian HALIBURTON ( - ). She and William Sinclair, 2nd Lord Sinclair had the following children:
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3. Catherine SINCLAIR was the daughter of Lord William Sinclair, 3rd Earl of Orkney 3rd Earl Orkney, 1st Earl Caithness and Elizabeth DOUGLAS.
4. Sir Oliver Sinclair of Roslin was the son of Lord William Sinclair, 3rd Earl of Orkney 3rd Earl Orkney, 1st Earl Caithness and Marjory SUTHERLAND.
5. William Sinclair, 2nd Earl of CAITHNESS was the son of Lord William Sinclair, 3rd Earl of Orkney 3rd Earl Orkney, 1st Earl Caithness and Marjory SUTHERLAND.
6. Lord Henry Sinclair, 3rd Lord Sinclair, son of Lord William Sinclair, 2nd Lord Sinclair 2nd Lord Sinclair and Christina LESLIE, was born between 1403 and 1421. He married Margaret HEPBURN before 4 December 1488. He died on 9 September 1513 in Flodden.
Margaret HEPBURN, daughter of Adam HEPBURN Master of Hailes ( - ), was born before 1478. She died between [Julian] 11 June 1542 and [Julian] 14 December 1542. She and Henry Sinclair, 3rd Lord Sinclair had the following children:
| 7 | Katherine SINCLAIR (bef1502- ). Katherine was born before 1502. |