Introducing Prince Louis Arthur Charles.

The Duke and Duchess of Cambridge revealed their third baby’s name today. The Kensington Palace announced in a tweet, “The Duke and Duchess of Cambridge are delighted to announce that the have named their son Louis Arthur Charles. The baby will be known as His Royal Highness Prince Louis of Cambridge.”

Every part of the name is related to the family’s history. Louis is also the name of Prince Philip’s Uncle, Lord Louis Mountbatten, who was assassinated by the IRA in 1979. Louis is also in Prince Williams, William Arthur Philip Louis, and Prince George’s, George Alexander Louis, names.

Arthur is both Prince Charles and Prince Williams middle name, and Charles is a nod to the grandfather, Prince Charles.