Begat: Odd Family Connections

Today would be Josiah Wedgwood's 281st birthday. Known best as the potter who revolutionized the industrial production of pottery, but was also Charles Darwin's grandfather. There are a lot of unexpected familial relations both by birth and marriage. Shemp Howard of the Three Stooges, for example, was married to Congressman Barney Frank's cousin. What other unexpected familial relations do you know of?