My apologies. Orson Card is the name of the first (or second?) trainer in the tutorial as a mage. I didn't know that they were different per hero type.

there is a Ragna the Butcher running the Thrasher on Bolo, that's one of the main characters from the recent fighting game Blazblue

Also, I'd like to add, although some of them might not be real Easter eggs:

The Barbarian Hero - Rake Yavik - the capital of Iceland where some of the Vikings/Berzerkers come from - Reykjavík

Thomas Torkve - a paladin gone insane in zealotry - somebody remembers Tomás de Torquemada, the founder of Spanish inquisition? A guy who inflamed by himself over 1000 stakes to burn the 'heretics'?

A vampire named Vlad is a cliche...

Von Cracov - Krakow is one of the biggest Polish cities, and there's one of the oldest, still working Universities in Europe in it.

Captain Cook - Captain Hook form Peter Pan

Big Uchkuk and Umkas - somewhat remind me of the book "The Last of the Mohicans", the Mohok father and son - Chingachgook and Uncas...

Professor Dambior - looks a lot like Dumbledore from Harry Potter

Sammail - Samael, Angel of Death in Jewish myths, lately one of the names of the Satan

Shenobi - Shinobi a.k.a. Ninja

dersu uzala is an excellent film made by akira kurosawa

LOL, I never knew that. :)

Here is another one - the Lizardman hero who guards the Dwarven king, Hagni's father, is called Ftagn - which is a word from the famous Lovecraft chant "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn"