Lady Mary Leslie (1753-1799) (1753–1799) Parents John Leslie, 10th Earl of Rothes Hannah Howard Children William Colyear Lady Mary Colyear John David Colyear Francis Colyear Lady Catherine Caroline Colyear Lady Julia Colyear Thomas Colyear, 4th Earl of Portmore Siblings Jane Elizabeth Leslie John Leslie, 11th Earl of Rothes Partners William Colyear, 3rd Earl of Portmore