Princess Margaret Rose of York was born August 21st, 1930, at Glamis Castle, Angus, Scotland, and at the time of her birth, she was fourth in the line of succession to the British throne.

While the royal couple haven't spoken about the tot's name, the addition of Rose may be a touching nod to Princess Margaret who shared the same middle name. The late Queen's sister's full name was ...

Princess Elizabeth’s lesson ... Wearing a big crown, giving everyone orders,” Margaret tells her sister eagerly. “Tell them. Margaret Rose can do it. Margaret Rose wants to do it.