Under rules that are more than a century old, any child or grandchild of the monarch can get royal titles. While Harry’s grandmother reigned, the Mountbatten-Windsor children, Archie Harrison, 3, and Lilibet “Lili” Diana, 1, were too far down the line of succession to be automatically entitled to royal titles. (The queen, namesake of little Lilibet, had the power to change that but did not, much to the chagrin of Harry and Meghan fans.) Under King Charles III, Archie and Lilibet as his grandchildren traditionally would be given new honorifics — but it is not clear whether they have received them yet.