[quote=Leidenschaft]
The problem with that is that ACTUAL peasants would have those names. Distinguishing a bastard should be giving them a distinguishable last name from the rest of society to bring shame on the eternal sin that siring a child out of wedlock/adultery is... or something.
[/quote]

Well remember in Game of Thrones they have some symbolism (Rivers, Snow, etc.) as well. I'm sure we can figure something out.