I like this subject, and find it interesting to see what others pick for their hunters.
Mine are:
Mozag - All her pets are either red, orange or a reddish-brown. I also choose animals I feel suit her race best, though with some execeptions (like the sporebat) because of the family skills. They're named violently because of an RP thing I did with a previous Troll character of mine. Suitably violent names were found from many of my favourite bands, and some I made up myself like Killer and Shredder, though I'm sure I could find bands with these words in their names, if I really wanted to.
Lazuli - For her I picked colourful pets, often yellow or purple, though she will also have a couple of spirit beasts, which will slightly break the theme, but I guess I'll have to deal with that! Names are gem or money based, such as Coin, Bijou, Coral, Amber, Moolah, Macaroon, Dollar, etc.
Lomelinda - Her pets are white, grey or blue, and also what I feel fits a Nelf best. She has far too many cats. The names are after flowers and trees, mainly.
Alburga - Her pets are what many would choose for an Undead. But since I hate the Undead models I can't make one, and felt a Worgen was tackily spooky enough to pick all these rotting creatures, spiders, bats, etc. for. They are named after old writers and poets I personally like, but whose names are elegant.
Finally, Ethelswitha is my "trashbin" character, to who I'm giving the pets I really want, but who don't fit in with the other four for whatever reason. She also needs all pet skills, so it's not perfect, but I'm pretty happy with what I've picked so far. The names are based on booze. So far I have a Malt, Tonic, Mary (Bloody Mary, y'know), Slammer and Rum.