Lord Mark Kerr British admiral (1776-1840) (1776–1840) Parents Elizabeth Fortescue William Kerr, 5th Marquess of Lothian Children Charles Fortescue Kerr, Viscount Dunluce Lady Frederica Kerr Lady Georgina Kerr Lady Caroline Kerr Mark Kerr Mark McDonnell, 5th Earl of Antrim Hugh Seymour McDonnell, 4th Earl of Antrim Charlotte Kerr Sidney Kerr William Kerr Lady Emily Kerr Siblings Lord Robert Kerr Lord Charles Beauchamp Kerr Lady Louise Kerr Lady Mary Kerr Lady Elizabeth Kerr William Kerr, 6th Marquess of Lothian Partners Charlotte MacDonnell, Countess of Antrim