David William Sinclair Buchan of Auchmacoy (1929-2015) (1929–2015) Parents Stephen Lloyd Trevor Olivia Trevor, 17th of Auchmacoy Children Robert Edward William Buchan Thomas Richard Sinclair Buchan James Alexander Stephen Buchan John Charles Augustus David Buchan of Auchmacoy, younger Sophia Jane Elizabeth Buchan Siblings Diana Trevor Elizabeth Trevor Anne Trevor Joan Rosemary Trevor Partners Blanche Susan Fionodbhar Scott-Ellis