Prince Richard is also a cousin of Queen Elizabeth II and the youngest grandchild of King George V and Queen Mary. The Prince married Birgitte, Duchess of Gloucester in 1972. They have three children – Alexander Windsor, Earl of Ulster, Lady Davina Lewis and Lady Rose Gilman – and six grandchildren – Xan and Lady Cosima Windsor, Senna and Tawe Lewis, and Lyla and Rufus Gilman.