I have the Sinclair Earls of Caithness as follows (please let me know of any errors),
1. William Sinclair b. abt 1415 d. 1482 also 3rd Earl/Prince of Orkney, 6th Lord of Roslin; grandson of Prince Henry Sinclair m- bef 15 Nov. 1456- Marjorie (Mary) Sutherland children- William 'the Waster', Oliver, William, Eleanor, David, Robert, John, Elizabeth, Marion, Margorie
2. William Sinclair b. 1455 d. 9 Sept. 1513 (@ Flodden Field, the Battle of Flodden) son of above m-1475- Mary (Margaret) Keith b. abt 1461 children- John, Alexander
3. John Sinclair b. abt 1490 d. 18 May 1529 (in battle trying to seize Orkney) son of above m- Elizabeth Sutherland b. abt 1488 children- George, William
4. George Sinclair b. 1533 d. 9 Sept. 1582 starved son in dungeon at Girnigoe m- Elizabeth Graham b. abt 1506 d. bef 4 April 1576 children- John 'Master of Caithness', George, William, Barbara, Elizabeth, Janet, Fnu, Agnes, unnamed
5. George Sinclair b. bef 1543 d. 1577/1578/1643 grandson of George 4, and son of John starved in Girnigoe dungeon m- Lady Jean Gordon
6. George Lost title and estates to Sir John Campbell of Glenorchy; (great grandson of above m- dau of the Marquis of Argyle)?
7. George Sinclair of Keiss d. 1698 won everything back in court including title
8. John Sinclair of Merchil b. bef/aft 1640 d. 1705 descended from a grandson of George the 4th m- Janet/Jean Carmichael b. abt 1640 children-
9. Alexander Sinclair b. ca 1670 d.1775/85 son of above, failed to have a male heir and so the title passed to a cousin m- Margaret Primrose (dau. of Archibald Primrose 1st Earl of Rosebery) children- Dorthea Sinclair b. 4 April 1739 d. 30 Sept. 1818 Hermitage House, Leith m- James Duff Earl of Fife 4 June 1759 no children
10. Lord William Sinclair of Ratter d.1789 descended from the 3rd grandson (Sir John Sinclair of Greenland) of George the 4th Earl children- John
11. John Sinclair d. 1789 son of above, fought in American War of Independence unmarried
12. Sir James Sinclair of Mey d. 1823 descended from a son of George the 4th Earl, received title in 1789 m-2 Jan. 1784- Jean Campbell children- Helen, John, Ester, Alexander, Charlotte, James, Patrick, Eric
13. Alexander Sinclair b. 1790 d. 1858/55 son of above
14. James d. 1881 in NY
15. George of Mey d. 1889
16. James Augustus Sinclair b. bef 1855 d. aft 1889/1881
17. John Sutherland Sinclair d. 30 May 1914 at Berriedale ranch in Lacota, North Dakota/ Representative in the 30s
18. Norman MacLeod Sinclair b. 4 April 1862
19.
20. Malcolm Ian Sinclair
I love all of this information but have little time to deal with it, thus I do not stand behind this info 100%. I do feel that it is reasonably accurate. If you have questions I can provide some sources. When taking notes I don't usually rule out dates that differ, I simply add them as an additional piece of information. My computer warns me when things are not feasible but two different sources can give you very different ideas when you get down to the numbers. I would like to expand this further so please feel free to give me all you've got!
thanks,
Michelle Hollberg