I suspect that you're a troll, but since I'm bored, a good place to start when deciding on a name for an orc DK is to find a good orcish name. This
is a list of notable orcs in the history of the race, while this
is a list of NPCs in the city of Orgrimmar, many of whom will be orcs.
Now, understand me, I'm not suggesting you go out and name yourself completely after an NPC or notable orc. A name like Terongorefiend would likely get forced to change as well. But use only the first name, or perhaps adapt it by changing the name a bit, and you would likely be fine.