To review, Queen Elizabeth and her husband were related. King Charles is related to both Diana and Camilla. Diana and Camilla are related to one another.

That leads to the next natural question of whether the future King of England, Prince William, is related in some way to his wife, Kate Middleton?

Well, again, not surprisingly, the answer is "yes."

William and Kate are fourteenth cousins once removed. Here's how, according to Patrick Cracroft-Brennan, from Cracroft’s Peerage: “Her great-great-grandmother, Frances Elizabeth Greenhow, was the 10 x great-granddaughter of Sir William Gascoigne, a Yorkshire knight who died in 1487. He married Lady Margaret Percy, 4th and youngest daughter of Henry Percy, Earl of Northumberland."

“The Earl descended from King Edward III through both his parents. Prince Charles and the late Princess Diana both descend from Sir William Gascoigne and his wife Lady Margaret," the source continues.

And so, “This makes William and Kate fourteenth cousins once removed through his mother and fifteenth cousins through his father."

At end of all of this, in case you're wondering what it means to be once removed, it's when your cousin has a child, and that child becomes your cousin, once removed, per My Heritage.