Prince Harry, officially known as Henry Charles Albert David, has surprised many royal fans as he celebrates his 40th birthday. His parents, Prince Charles and Princess Diana, decided he would be called 'Harry' in everyday life, reserving 'Henry' for formal occasions or when he was in trouble. Notorious for his childhood mischief, Harry earned the nickname 'Kamikaze Harry' due to frequent antics, including hitting his sibling with a snooker cue and forging his nanny's handwriting to get pizza. Social media reactions highlight the shock among fans learning his real name, alongside the fact that members of the royal family do not traditionally use surnames. Harry has also joked about the confusion, stating, 'My name is Henry, but everyone calls me Harry.' His children, Archie and Lilibet, carry the surname Mountbatten-Windsor, reflecting his family's naming conventions.