First or middle names on the brink of extinction

[mesquite]

Endangered boys' names
In greatest danger of extinction for the boys are:

•Bertram
•Clifford
•Frasier
•Godfrey
•Mortimer
•Virgil

Endangered girls' names disappearing fast are these girls' names:
Bertha
Corrine
Dinah
Edwina
Philomena
Gretchen

What about Myrtle?

Ladies, only you can save a name.