-mann translates to “manly or heroic”, “male person”, or “servant of”.
So Zimmerman would likely be “room servant”.
And...just found out that “schvahts” means black. Gotta reset my thinking because I thought “negger” (ref: schwarzenegger) meant black.
I’m gonna stick with your “room servant” or, possibly, in the Old South: “house ni**er”!