I call both of my dogs names that don't even sound similar to their real names and they know them all and they know who I am talking to when I say them.
Sinister ~ Little Sister, Handsome, Sin, Sinner, Sinny, Dodo, Dodo Brains, Drama Queen, My Prince and Big Boy.
Draco~ Little Dude, Lil Pup, Draco Malfoy, Mr. Malfoy, Drake or Little Prince.
Sinister ~ 5 yr old black male GSD 3.11.09
Draco ~ 9 mth old male Dalmatian 6.30.13