Kaye is my middle name! (Notice my mother's attempt at being original by adding an E.)
Ah, I love the name
Bellatrix. Even though, you know, the whole thing with
Harry Potter and 'her' killing
Sirius. I don't really think it goes too well with
Kay as a first name though.
Probably out of all your choices,
Kay Penelope. It's a good name I think.
I suggest the following:
3 names:
Kay Adela ("noble")
Leigh
2 names:
Kay Ryanne (varient of
Ryan)
Kay Leandra (varient of
Leander, meaning "lion of man")
Kay Leanora (varient of
Leonora, varient of
Eleanor)
Kay Romayne (in the long run meaning
Roman)
I hope this helped some.