Astor, Astore and Astorre have been used as masculine names in Italy, though:
https://it.wikipedia.org/wiki/Astorre (in Italian)
It seems a bit odd that the possible feminine versions never caught on, because most Italian masculine names have at least one well-documented feminine version. Who knows why, but I think it's a shame! It would have been neat to at least see an Astora walk around somewhere.
"It is no measure of health to be well-adjusted to a profoundly sick society." ~ Jiddu Krishnamurti (1895-1986)