His older brother is George Mountbatten, 4th Marquess of Milford Haven. Ivar is also the godfather of Lady Louise Windsor (born 2003), the daughter of Prince Edward and his wife Sophie.

Time for a deep dive! ’Kay, so Lord Ivar’s dad was Marquess David Mountbatten, and his grandfather was Marquess George Mountbatten. Turns out, George was the oldest son of Marquess Louis Mountbatten, ...