at least she had an actual given name ...
It was Claudia. When she was a baby, a nurse said she was "as purty as a little lady bird" (meaning a female bird; the beetle is in this country called the ladybug).
Personally I think those kinds of nicknames should be kept strictly within the famly and usually in childhood only.
But it seems to be an upper-class thing, adults going by babyish nicknames. We also have Tipper (Mary) Gore and Scooter (Lewis) Libby.
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin