Sorta. Ača's a name where I'm from, it's how we shorten Aleksandar sometimes; it seemed a bit nicer to put that on it and make it a bit more of a name, since "hlače" is just "pants."

[...yeah.]

Lobanja is "skull", pretty much? But it's close enough to a name to pass, and all of that's better than directly introducing people to my Pokémon, Pants and Skullface.