Conkeldurr's English name might be a play on the internet Meme/Phrase "Hurr, Durr, Derp, Err" explaining its facial expression.
Conkeldurr appears to be based on a construction worker. It also closely resembles a buff clown or "muscleman" from a carnival sideshow, giving it a less serious appearance (due to its large red nose and clown-like face and colors). Conkeldurr seems to sport a grey goatee on its chin as well as some sort of top-knot, giving off the impression of an old martial arts master.
Conkeldurr's English name is derived from "concrete" and "elder".