Duke and Duchess of Gloucester ($13 million)
Prince Richard, Duke Gloucester, is the first cousin of Queen Elizabeth and the youngest grandson of King George V. In 1974, he took over his father’s role and gave up his career as an interior designer in order to focus on his duties as Duke.
The Duke is involved in some noble causes, and he also serves as the Chancellor of Worcester University. In 1972 he married Birgitte Van Deurs, a Danish woman. They have three children together. The couple’s combined worth is estimated to be around $13 million.