I think of Zale's: The Diamond Store. I kind of like the sound, but not enough.
I'd spell it Zale, I guess. Zayl, Zail? Zayle?
Probably male. It is a surname, in the case of the store-- Morris Zale, William Zale, and Ben Lipshy were the founders. I guess it could work on a girl too.
I like the idea of it as a nn for Azalea, as mentioned by Serafina Starstrider.
Zale Alexander
Zale Henry
Zale Thomas
Zale Everett
Zale Merrick
Zale Delphine
Zale Odessa
Zale Olympia
Zale Talitha
Zale Iridessa