Yes, why not?

Why no have something like angel cummoners as well?

Ow how about seraphim summoners?

Even better, how about summoner summoners?

Garden gnome summoners? Hey, garden gnomes can be pesky when angered!

Women summoners? Or women-with-pms summoners? (A whole new challange)

Or even better! Druid summoners or Necromancer summoners!

Why not throw in an Administrator summoner? Should keep em folks in control on their toes...