The Leith, later Leith-Buchanan Baronetcy, of Burgh St Peter in the County of Norfolk, is a title in the Baronetage of Great Britain. It was created on 21 November 1775 for Alexander Leith, Member of Parliament for Tregony. The third Baronet married Jemima, daughter of Hector Macdonald Buchanan. Their son the fourth Baronet assumed the additional surname of Buchanan in 1877. The presumed seventh Baronet never successfully proved his succession and was never on the Official Roll of the Baronetage. Likewise, as of 13 June 2007 the presumed eighth and present Baronet has not successfully proven his succession and is therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant since 1973. For more information, follow this link.
The Leith family is of Scottish origin and descends from William Leith, Provost of Aberdeen in the 14th century.