popular male names of the 1940s...
Your list of MALE names includes:
Betty
Sondra
Bonnie
Judith
Nancy
Judy
Joan
Doris
Gloria
Kathleen
Elizabeth
Bernice
Janet
Helen
Janice
Brenda
Ruth
Martha
June
Pearl
Alice
Isobel
Annie
Dolores
Rose
Jane
Betty
Sondra
Bonnie
Judith
Nancy
Judy
Joan
Doris
Gloria
Kathleen
Elizabeth
Bernice
Janet
Helen
Janice
Brenda
Ruth
Martha
June
Pearl
Alice
Isobel
Annie
Dolores
Rose
Jane
Replies
This is because the figures are based on the Social Security data. When this data was computerized, there were obviously many errors made in typing in the gender code. So, especially before the 70s, most names which were really common for females are going to show up somewhere in the bottom half of the top thousand list for males just because of those errors. So these names are on that list just because of data entry mistakes.