Bastard names of Westeros
One of the interesting things about A Song of Ice and Fire is the surnames given to bastards - illegitimate sons and daughters of noble lords. They're specific to the region that that person was born at, so for example, bastards of the North are called Snow, while those in the Vale are Stone. A Wiki of Ice and Fire has the rest. The Ironborn have the least creative, with their bastards bearing the name Pyke. Yeah, they name their bastards after the castle of the Iron Islands. You'd think they would have gone with the obvious choice of Iron, but I can't say that I'm not surprised; the Ironmen don't strike me as clever. On the other hand, at least they haven't pulled an Aegon IV and legitimatized all of their bastards, which can lead to serious problems down the road.