James Hamilton, 4th Duke of Abercorn 4th Duke of Abercorn (1904-1979) (1904–1979) Parents Rosalind Hamilton, Duchess of Abercorn James Hamilton, 3rd Duke of Abercorn Children James Hamilton, 5th Duke of Abercorn Lady Moyra Hamilton Lord Claud Hamilton Siblings Cynthia Spencer, Countess Spencer Lord Claud Hamilton Lady Katharine Hamilton Lady Mary Hamilton Partners Kathleen Hamilton, Duchess of Abercorn