Hugh Seymour McDonnell, 4th Earl of Antrim (1812-1855) (1812–1855) Parents Lord Mark Kerr Charlotte MacDonnell, Countess of Antrim Children Lady Helen McDonnell Siblings Mark Kerr Sidney Kerr Lady Emily Kerr Mark McDonnell, 5th Earl of Antrim William Kerr Charlotte Kerr Lady Frederica Kerr Charles Fortescue Kerr, Viscount Dunluce Lady Georgina Kerr Lady Caroline Kerr Partners Lady Laura Parker