I would have guessed each of those names as a feminine name, but I guess they are in fact unisex. (In my part of the world,
Avery is only ever used for girls.
Averill isn't really used at all here, but it looks like
Avril at first glance which is probably why it also feels feminine to me.) I'd go with
Averill, though, since it feels the most masculine of the three.
For combos:
Averill JacobAverill JoashAverill JeremiahAverill JosiasAverill JonathanAverill Jude