KOZA - Czech (eastern Ashkenazic): from western and eastern Slavic koza ‘nanny goat’, probably applied as a metonymic occupational name for a goatherd.
In case you didn't realize (and if you did, you deserve the Obscure Fact Know-er of the Year award), my last name translates directly to "goat" in the land of my dad's ancestors.
If only I had inherited my mother's plain Anglo-Saxon family name. It would have aroused far less nominal humiliation.
On the bright side, it wouldn't have lent itself nearly as well to thematic Etsy searches...