There's always Phillipa (it's from ST:TNG, but Mrs. WHD doesn't need to know that).
You know, you might go for something unusual, like Julie, Ruth, Joanna, Maren (there's a thought - this world needs more Marens), Janet, Alice, Christy (or Christina), Jennifer, Margaret....
Edit: and it just struck me that
MR. WHD has been a busy boy.
I am
Dawg