Anne Katherine Mac Donnell, Countess of Antrim (1778-1834) (1778–1834) Parents Randal William MacDonnell, 1st Marquess of Antrim Letitia Morres Children Frances Vane, Marchioness of Londonderry Siblings Charlotte MacDonnell, Countess of Antrim Lady Letitia Mary MacDonnell Arthur Hill-Trevor, 2nd Viscount of Dungannon Partners Sir Henry Vane-Tempest, 2nd Baronet