I nominated them as Podebrat and vastly prefer to go with that name, which is why I nominated them that way :(

Most of the fandom on AO3 seems to use Podebrat as well. There are 12 works in the fandom. Of those 6 use Podebrat. 1 uses Foddebrat. 1 uses Podebright. (The others are either russian or don't feature those characters)