Randal Alexander McDonnell, 10th Earl of Antrim DL (born 2 July 1967), previously known as Viscount Dunluce, is a Northern Irish landowner, with an estate based at Glenarm Castle, and a City of London businessman, chairman of Sarasin & Partners LLP. He is also a Deputy Lord Lieutenant of County Antrim and Chief of the Name of the Clan McDonnell of the Glens.