John Sinclair

John Sinclair (died April 1566) was an Ordinary Lord and later Lord President in the Court of Session. He performed the ceremony marrying Mary, Queen of Scots to Lord Darnley. Family He was the fourth son of Sir Oliver Sinclair of Roslin (d. after 11 April 1510) by his spouse Margaret, daughter of William Borthwick, 2nd Lord Borthwick. John was a younger brother of Henry Sinclair, Bishop of Ross, and their sister Margaret was married to Robert Lauder, of The Bass (d. June 1576). In a Precept of Clare Constat (GD122/1/340, NAS) dated 2 May 1566, John [Sinclair], Bishop of Brechin, is referred to as "maternal uncle of Robert Lauder of Popple, knight, heir of Robert Lauder of Bass, and Margaret Sinclare, sister of Robert Sinclare of Over Liberton". Career