 Their only son, Alastair, died in 1943.When The 2nd Duchess of Fife died in 1959, her hereditary peerages passed to her nephew James Carnegie (1929–2015), eldest son of her sister Maud and her husband Charles Carnegie, 11th Earl of Southesk (1893–1992).Thirty-three years later, in 1992, The 3rd Duke of Fife also succeeded his father as 12th Earl of Southesk and chief of the Clan Carnegie.