(http://i.imgur.com/cywXpsw.png?1)
So, as you can see, two of those cyclops have birth dates, while one doesn't.
Am I correct in assuming the ones that doesn't was generated at the start of the world and the other two were born while world gen was running the history?
If that's the case... Well, I didn't know semi-megabeasts could... mate.
Also, when I was retelling what happened to a lady to convince her of taking me as a guard, she said that I was brave for slaying one of those cyclops, but that I was also a murderer for killing another one of those cyclops. But NPCs only call you murderer when you kill an innocent (mistaking a child playing make believe for a goblin with red glowing eyes, for example), right?
Could it be that one of those cyclops was peaceful or something? they were all chilling near the same "cave"*, located by a river, and at least two were beating up gremlins.
*according to the map, the cave was on the middle of a river. I couldn't find it.