Marie de Mariategui, Duchess of Pomar1 
Marie de Mariategui, Duchess of Pomar was born in 1830.3 She was the daughter of Senor Don José de Mariategui.4 She married, firstly, General Count unknown of Medina Pomar before 1872.1 She married, secondly, James Sinclair, 14th Earl of Caithness, son of Alexander Campbell Sinclair, 13th Earl of Caithness and Frances Harriet Leigh, on 6 March 1872 at Windsor Street, Edinburgh, Midlothian, ScotlandG.5 She died on 3 November 1895 at 124 Avenue de Wagram, Paris, FranceG.3 She was buried on 26 November 1895 at Holyrood House Chapel, Edinburgh, Midlothian, ScotlandG.3
From before 1872, her married name became Medina Pomar.1 After her marriage, Marie de Mariategui, Duchess of Pomar was styled as Countess of Caithness on 6 March 1872. From 6 March 1872, her married name became Sinclair.1 She was created 1st Duchess of Pomar [Papal States] in 1879, by HH Leo XIII.1
- [S37] BP2003 volume 1, page 645. See link for full details for this source. Hereinafter cited as. [S37]
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 484. Hereinafter cited as The Complete Peerage.
- [S37] BP2003. [S37]
- [S6] Cokayne, and others, The Complete Peerage, volume II, page 483.
Hon. William Leigh Canning Sinclair1 
- [S37] BP2003 volume 1, page 645. See link for full details for this source. Hereinafter cited as. [S37]
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 357. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
- [S37] BP2003. [S37]
Hon. Alexander Eric George Sinclair1 
He gained the rank of officer in the 91st Regiment.1
Lt.-Col. Hon. James Sinclair1 
He gained the rank of Lieutenant-Colonel.1
John, Earl of Caithness1 
On 12 May 1291 he had a letter of safe conduct to go to King Edward.1 In August 1297 he swore fealty to King Edward at Murkle.1
Child of John, Earl of Caithness
- Magnus, Earl of Caithness1 d. fr 6 Apr 1320 – 1329
- [S323] Sir James Balfour Paul, The Scots Peerage: founded on Wood’s edition of Sir Robert Douglas’s The Peerage of Scotland (Edinburgh, Scotland: David Douglas, 1904), volume II, page 318. Hereinafter cited as The Scots Peerage.
Hon. Kirsten Ann Sutherland1
- [S37] BP2003 volume 3, page 3828. See link for full details for this source. Hereinafter cited as. [S37]
Hon. Patrick Campbell Sinclair1 
Maj.-Gen. unknown McGregor1
Child of Maj.-Gen. unknown McGregor
- Isabella McGregor2 d. 13 Mar 1853
Isabella McGregor1 
Her married name became Sinclair.
Hon. Eric George Sinclair1 
He gained the rank of officer in the Royal Navy.1
