Yes, I know it's not much of an accomplishment, considering that he is the weakest of the named monsters, but he was the first named monster that I have ever killed (Other than Jenny, but I actually teleported her away this game).
I let my slave, Ivan, battle him a bit but then Ivan died and I went into battle with him. I sensed danger, but kept hitting him and then I just finished him off with a wand of striking. He dropped some nice loot too. Mithril spear and Meteoric Steel helmet and chain mail. I engraved 'Rondol the kobold patriarch killed here' where I killed him, and 'Ivan the faithful slave killed here' where my slave died.
Anyways, I'm super excited about this game. It's going good so far.
Edit: Eh... I died on GC4 after I got polymorphed into a mutant bunny and then destroyed by an orc... It was my best game yet... all gone...