There have been two creations of baronets with the surname Arbuthnot, both in the Baronetage of the United Kingdom and both are extant.
The Arbuthnot Baronetcy of Edinburgh was created in the Baronetage of the United Kingdom 3 March 1823 for Sir William Arbuthnot, Provost of Edinburgh. The coat of arms of this baronet includes supporters.
Sir William Arbuthnot, 1st Baronet (1766–1829)
Sir Robert Keith Arbuthnot, 2nd Baronet (1801–1873) married Anne Fitzgerald, daughter of Field Marshal Sir John Forster FitzGerald, G.C.H., and his wife, Charlotte, child of the Hon. William Hazen. Lady Arbuthnot's Chamber is named after Anne, who died at Florence, Italy, 6 March 1882, her husband having predeceased her on 4 March 1873. The couple had five sons and two daughters.
Sir William Wedderburn Arbuthnot, 3rd Baronet (1831–1889)
Sir Robert Keith Arbuthnot, 4th Baronet (1864–1916)
Sir Dalrymple Arbuthnot, CMG, DSO, 5th Baronet (1867–1941)
Sir Robert Dalrymple Arbuthnot, 6th Baronet (1919–1944)
Sir Hugh Fitzgerald Arbuthnot, 7th Baronet (1922–1983), married Julia Grace, daughter of Major General Frederick Peake
Sir Keith Robert Charles Arbuthnot, 8th Baronet (born 1951) was educated at Wellington College and Edinburgh University.
The heir apparent to the baronetcy is Robert Hugh Peter Arbuthnot (born 1986), eldest son of the 8th Baronet.
Arms: azure, a crescent between three mullets, two and one, argent; the whole within a bordure or, charged with three boars' heads couped gules.
Crest: a peacock's head proper.
Supporters: dexter, a wyvern vert vomiting flames; sinister, a greyhound argent, collared and line reflexed over the back gules.
Motto: Innocent and true.
The Arbuthnot Baronetcy of Kittybrewster in the County of the City of Aberdeen was created in the Baronetage of the United Kingdom 26 February 1964 for John Sinclair Wemyss Arbuthnot, for services to church and state.
Sir John Sinclair Wemyss Arbuthnot, 1st Baronet (1912–1992)
Sir William Reierson Arbuthnot, 2nd Baronet (born 2 September 1950) was educated at Eton College, Berkshire and The College of Law, London.
Heir apparent: Henry ("Harry") William Arbuthnot (born 2011)
Arms: azure a crescent between three mullets argent, a bordure gules charged with two escallops in chief and a buck's head cabossed or in base, and in centre chief (overlapping bordure) an inescutcheon argent.
Crest: a peacock's head and neck proper, accompanied on either side by a spray of strawberry leaves vert, each flowered of a cinquefoil argent.
Motto: Deum laudans ('Praising God').
