Although I do like the thought of Princess Royal as Godmother, she is 65 yrs older and by the time Charlotte would be old enough to take on royal duties, she would be in her mid 80s.
It would be good if Charlotte had someone born a princess but I don't think Beatrice/Eugenie will be chosen.
I think the Cambridge's were right in choosing people who are their age and perhaps the age of a young grandparent, plus a v young person for George. Great range that could give relevant support as the young royals grow up. I expect the same pattern for Charlotte.
so Van Cutsem, Meade, Peter Philips, Emilie (friend of Kate's) and maybe Sophie or Tiggy Pettifer. Who a young person would be not sure.
Whoever they are, I hope they are prepared for intrusive interest by the media.