After holding our collective breath for four days, we finally have a name for the new Royal baby — Louis Arthur Charles.

The baby will be known as His Royal Highness Prince Louis of Cambridge.

The name Louis is in honor of  Prince Charles’ beloved great-uncle, mentor and ‘honorary grandfather’, Lord Mountbatten, who was killed in 1979 when the IRA placed a bomb in his fishing boat.

Lord Louis Mountbatten.