William Arthur Philip Louis
There are many. There is Andrew, William, and Charles. Those are the best of the baby names that mean prince. :)
Yes, Prince William has one son, Prince George.
Yes, Prince William has one son, Prince George.
Prince William has one younger brother, Harry.
None, but he has a brother, Prince Harry.
Kate and Prince William have three children as of the birth of Prince Louis in April 2018, to join Prince George and Princess Charlotte.
Lots
Kate and Prince William have three children as of the birth of Prince Louis in April 2018, to join Prince George and Princess Charlotte.
Prince William is second in line to the throne, after his father, Prince Charles. Third in line is William's brother, Prince Henry. However, it is unlikely that Henry will become King because William's children will come before Henry in the line of succession: first the male children, oldest to youngest; followed by the female children, oldest to youngest. Unless William passes away with no children (and assuming his wife is not pregnant with the heir, in which case the heir would be king/queen and a regent would reign for him/her until he/she comes of age) the next on the throne after William will be William's eldest son, or his eldest daughter if he has no sons. See the related question link below.
there are four in England prince Charles, prince William, prince Henry (harry), and prince Phillip( queen Elizabeth's husband)
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Prince Philip, Prince Michael of Kent, Prince Charles, Prince Andrew, Prince Edward, Prince William, Prince Harry. There may be others but I can't think of them.