I knew that title didn't sound right! But, as I said, I didn't have the book at hand. If Aunt Dora was a Gerrie-flapper, I never knew about it and only found out about the name recently, long after she had died.
Given that she lived her entire life in Little Rock, AR, I think she could only have been a Gerrie-flapper in sympathy. In fact during that era I can't imagine how she could even had heard Ferrar sing, except on recordings. (Jerry was born in 1922.)
When I asked Jerry about it, she just said her mother really admired the singer.
Now, I guess we could talk about another of Barbara's books, The Emperor Sauerbraten.