Hmm, having worked for a vet, and had my own grooming business, I can do this for multiple breeds--for some reason the male dogs' names are jumping to mind first:
Definitely "Zeus" for male Dobes, Apollo probably comes in second to that, then you have the descending order of "evil" names, with Damien being first, then Demon, Satan, and then the gun names.
For Chows, I'm always shocked if it's NOT named Bear.
For Shih Tzus, Gizmo for boys, Daisy or Sadie for girls, a few girls named Gizmo, as well.
For Schnauzers, there seem to be only three to four naming options available: Pepper, Gretchen (or Gretal), Max, and Hans.
For girl poodles, oh dear gawd it must be Princess. Or Sugar or Sweetie. Boy poodles are very, very often Pierre, or Cuddles.
Boy Chihuahuas are so often "Rambo," that if you yelled that out the door, at least seven would come running to you.
If you then yelled "Brutus" and "Bruno," you'd get all the rest of the remaining Chis.
Humans, so imaginative!
Edit--because how could I forget Max for GSDs?!