 Born in Jedburgh as Lady Clare Kerr, Lady Euston is the fourth child of Peter Kerr, 12th Marquess of Lothian, and his wife Antonella (née Newland).Clare married James FitzRoy, Earl of Euston, son and heir apparent to the 11th Duke of Grafton, on 16 September 1972.He predeceased his father in 2009.