Cracroft's Peerage
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Thurso, Viscount (UK, 1952)


Creation: let. pat. 10 Apr 1952


Family name: Sinclair




Quarterly:  1st, Azure a Ship at anchor her oars erect in saltire within the Royal Tressure Or;  2nd and 3rd, Or a Lion rampant Gules;  4th, Azure a Ship under sail Or;  over all dividing the quarters a Cross engrailed quarterly Argent and Sable all within a Bordure quartered Or and Gules the last charged with three Stars of the first


A Star of six points waved Argent rising from a Cloud proper


On either side a Red Deer proper


Above the Crest:  Ad Astra Virtus (Virtue knows no bounds); Below the Arms:  J'Aime Le Meilleur (I love the best)



Archibald Henry Macdonald [Sinclair of Ulbster], 1st Viscount Thurso, KT CMG PC

only son of Lt Col Clarence Granville Sinclair (by his wife Mabel Sands, dau. of Mahlon Sands, of New York, New York, USA), 1st son and hr. apparent of Sir John George Tollemache Sinclair of Ulbster, 3rd Bt., by his wife Emma Isabella Harriet Standish, dau. of William Standish Standish, of Duxbury Park, co. Lancaster


22 Oct 1890


18 May 1918 Marigold Forbes (d. 11 Feb 1975), 1st dau. of Lt Col James Stewart Forbes, of Aslown, co. Aberdeen, by his first wife Lady Angela Selina Bianca St Clair-Erskine, 3rd dau. of Robert Francis [St Clair-Erskine], 4th Earl of Rosslyn


1. Hon Robin Macdonald Sinclair of Ulbster, later 2nd Viscount Thurso

2. Hon Angus John Sinclair, of 19 The Chase, London SW4 (b. 21 Apr 1925), mar. (1) 26 Feb 1955 (div. 1967) Pamela Karen Bower, 1st dau. of dallas Bower; (2) 27 Feb 1968 (div. 1992) Judith Anne Percy, and (3) 1992 Kate Hunting, widow of Leonard Hunting and dau. of William Henry Fry, and has issue by his second wife

1. Hon Catherine Sinclair ,artist (b. 25 Oct 1919), mar. 18 Jun 1957 Kazimierz Zielenkiewicz (d. 1988), son of Josef Zielenkiewicz, of Sosnowiec, Poland, and has issue

2. Hon Elizabeth Sinclair (b. 5 Jun 1921; d. 1994), mar. 18 Jul 1942 Lt Col (Archibald) Michael Lyle JP DL, of Riemore Lodge, Dunkeld, co. Perth (b. 1 May 1919), 3rd son of Sir Archibald Moir Park Lyle, 2nd Bt. MC JP DL, of Glendelvine, co. Perth, by his wife Dorothy de Hoghton, 1st dau. of Sir James de Hoghton, 11th Bt., and had issue


15 Jun 1970

suc. by



10 Apr 1952 Viscount Thurso, of Ulbster in the County of Caithness


suc. his grandfather 29 Sep 1912 as 4th Baronet of Ulbster;  Lord Lieutenant of Caithness 1919-64; Private Secretary to Secretary of State for the Colonies 1921-22; CMG 1922; Member of Parliament (Liberal) for Caithness and Sutherland 1922-45; Chief Liberal Whip 1930-31; Secretary of State for Scotland 1931-32;  Privy Councillor 1931; Leader of the Liberal Party 1935-45; Lord Rector of the University of Glasgow 1938-46; Secretary of State for Air 1940-45; Knight of the Thistle 1941


Robin Macdonald [Sinclair of Ulbster], 2nd Viscount Thurso


24 Dec 1922


14 Feb 1952 Margaret Beaumont Brokensha (b. 1919; widow of Lieut Guy Warwick Brokensha RN DSC; d. 2017), 1st dau. of Col Josiah James Robertson DSO MBE, of Norwood, Wick, Caithness


1. Hon John Archibald Sinclair of Ulbster, later 3rd Viscount Thurso

2. Hon Patrick James Sinclair, of Woodford, Eel Pie Island, Twickenham, co. Middlesex (b. 21 Dec 1954), mar. 1974 (div. 1984) Carol North, and has issue

1. Hon Camilla Janet Sinclair (b. 2 Aug 1957), mar. 1983 Robert Bruce Sanson, of Puketotara Road, Whangarei, New Zealand, and has issue


Jun 1995

suc. by



served in World War II 1941-45 as F/Lt RAF; Member, Caithness County Council 1949-61 and 1965-95; Member, Thurso Town Council 1957-61 and 1965-95; Lord Lieutenant of Caithness 1973-95


John Archibald [Sinclair of Ulbster], 3rd Viscount Thurso


10 Sep 1953


12 Jun 1976 Marion Ticknor Sage, 2nd dau. of Louis Davidson Sage, of Connecticut, USA


1. Hon James Alexander Robin Sinclair of Ulbster, Yr. (b. 14 Jan 1984)

2. Hon George Henry MacDonald Sinclair (b. 1989)

1. Hon Louisa Ticknor Beaumont Sinclair (b. 15 Mar 1980)


hotelier; Member of Parliament (Liberal Democrat) for Caithness, Sutherland and Easter Ross 2001-15; elected to the House of Lords 2016


Last updated 11 Jun 2017




3rd Viscount Thurso, of Ulbster in the County of Caithness

(United Kingdom, let. pat. 10 Apr 1952)

6th Baronet, styled "of Ulbster"

(Great Britain, let. pat. 14 Feb 1786)



Orchard Cottage, Champneys, Hertfordshire HP23 6NY



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