William McDonnell, 6th Earl of Antrim (1851-1918) (1851–1918) Parents Mark McDonnell, 5th Earl of Antrim Jane Macan Children Randal McDonnell, 7th Earl of Antrim Angus McDonnell Lady Sybil McDonnell Siblings Lady Jane McDonnell Lady Caroline McDonnell Lady Mabel McDonnell Schomberg Kerr McDonnell Lady Helena McDonnell Alexander McDonnell Mark McDonnell Hugh McDonnell Lady Evelyn McDonnell Partners Louisa McDonnell, Countess of Antrim