My LoRD name is, surprise surprise, my real IRL name.
Forum name is what I prefer most english-speaking people shorten it to. I guess Kat or Kath would work too, but those are usually too short for usernames.
Katherine or Kathy have been my character names since high school or so, and ofcourse Katherine has been my name since I was born.
In case of games with multiple characters to name, I usually pick a name from whatever book I'm reading. Preferably something not too uncommon sounding.
Oddly enough it's not taken very often, guess not a lot of people actually use normal
names for games huh?