Earl of Antrim is a title that has been created twice, both times in the Peerage of Ireland and both times for members of the MacDonnell family, originally of Scottish origins.
Antrim House, Merrion Square
Vice-Admiral Lord Mark Robert Kerr was an officer of the Royal Navy.
Portrait of a Lady (likely his wife, Charlotte MacDonnell, 3rd Countess of Antrim), by Hugh Douglas Hamilton, 1790s