Princess Alexandra, The Honorable Lady Ogilvy – $22 to 25 million
Princess Alexandra, The Honorable Lady Ogilvy, was Prince Michael’s sister and the Queen’s cousin. Her given name was Alexandra. Despite being pushed further down the succession ladder, she showed no sign of being bothered. In 2004, her husband died and she was left with his entire wealth. Her savings and her husband’s inheritance combined to give her a sizable windfall. It wouldn’t be difficult for her to start a hat collection by collecting different kinds of hats.

Princess Alexandra, The Honorable Lady Ogilvy – $22 to 25 million