Avis is a feminine name.
[The girl's name Avis \a-vis\ is pronounced AY-viss. It is of Old German origin. From a Norman French form of the Old German name Aveza, derived from a short form of names with [av]. The Latin [avis] means [bird] .]
Source: I know if as a girl's name and couping information from below link:
http://www.thinkbabynames.com/meaning/0/Avis