Not sure if this show was a rerun but he asked a couple gals what Prince Charles' last name is....they got it wrong by saying "Wales" Which is semi true to a point.....BUT Ben didnt get it right either! He said "Windsor"...Prince Charles' full name, including last name is "Charles Philip Arthur George Mountbatten-Windsor"....BUT not too many people know that their surname used to be "Saxe-Coberg" and they changed it during WW2 to hide the fact that it was a German name! And Prince Charles actually signs his name "Charles Phillip Arthur George Mountbatten-Windsor" as is on his 2nd wedding certificate.

Hi brother Prince Edward uses the surname Windsor tho, with no Mountbatten attached to it.

Prince Williams name tag on his military uniform has his last name on it as do everyone s in their service.It says WALES.