First of all,
Delaney isn't female. It's unisex at the very least, being a surname. Secondly, it doesn't mean "descendant of the challenger":
DELANEY m,f
Usage: English
Pronounced: de-LAYN-ee
From the
Norman surname
De l'aunaie meaning "from the alder grove" in French.
But I agree that Delaina could be an alternate, "feminised" version of
Delaney. Or it could be an elaboration of Elaina (see
Elaine).
Miranda