This is American solicitor Daisy, with siblings with the very formal names:
Maude
Clarence
Albert
Maximilian
Her full name was Daisy Ella.
https://en.m.wikipedia.org/wiki/Daisy_E._Nirdlinger
Maybe it is because I'm British, but generally it's considered pretentious to have a long name that you never use. I know more Freddie's than Frederick's, so Margaret 'Daisy', where the connection is not so obvious, comes across as snobbish.