Thanks both of you for the response! I definitely like Matz, and Mathewelin. So I think I'ma build off of those!

I tried to find what heim is used for and came up with that it was roughly home? I like that last part of Guk is German sounding too, but their last name is supposed to be war-related. But thanks for the idea, I think I'm going to search for suffixes that mean like blood, blade, or something along war nickname lines.