William Boyd, 4th Earl of Kilmarnock, was born 12 May 1705 in Kilmarnock, Ayrshire, Scotland, United Kingdom to William Boyd, 3rd Earl of Kilmarnock (c1683-1717) and Euphemia Ross (1684-bef1729) and died 18 August 1746 Tower Hill, London, England, United Kingdom of execution by beheading. He married Anne Livingston (bef1707-1747) 15 June 1724 .
He was attainted as a Jacobite rebel, so his titles were not inherited by his descendants. However, his wife's inheritence passed to her children.
|Offspring of William Boyd, 4th Earl of Kilmarnock and Anne Livingston (bef1707-1747)|
|William Boyd (1725-bef1728)|
|James Hay, 15th Earl of Erroll (1726-1778)||20 April 1726 Falkirk, Stirlingshire, Scotland, United Kingdom||3 July 1778 Callendar House, Falkirk, Stirlingshire, Scotland, United Kingdom||Rebecca Lockhart (bef1734-1761) Rebecca Lockhart (bef1734-1761) Isabella Carr (1742-1808)|
|Charles Boyd (c1728-1782)|
|William Boyd (1730-1780)|