Claire Alexandra Windsor, Countess of Ulster, born Claire Alexandra Booth, is the wife of Alexander Windsor, Earl of Ulster, who is the son of HRH Prince Richard, Duke of Gloucester and his wife HRH The Duchess of Gloucester, formerly Birgitte van Deurs of Denmark. The Countess of Ulster is also a physician by professsion. Marriage is a relationship that plays a key role in the definition of many families. ... the Earl of Ulster Alexander Patrick Gregers Richard Windsor, Earl of Ulster (born 24 October 1974) is the only son of the Duke and Duchess of Gloucester. ... The Duke of Gloucester in Garter robes. ... HRH The Duchess of Gloucester Her Royal Highness Princess Richard, Duchess of Gloucester (Birgitte Eva Windsor, née van Deurs), styled HRH The Duchess of Gloucester (born June 20, 1947), is a member of the British Royal Family, the wife of HRH Prince Richard, Duke of Gloucester, a grandchild of...