Hi there.
From what I gathered from a genealogy product I bought several years ago, "
Timm" comes from one of two sources: It is derived from "theudemar", an older
German word meaning "famous among your people" and/or it is an occupational name, being an abbreviated form of "
Zimmerman", which means "carpenter" in
German (thus, probably
Timm,
Timms,
Timmer,
Timmerman, Zimm,
Zimmer, and
Zimmerman are somewhat related).
While I can't speak for all
Timms, I know in my family's case it's definitely the latter, as my great-grandfather and at least two of his brothers were carpenters.
Form what I've gathered, most of the
Timms are from Pommerania (Pommern in
German), an area of north-west Germany around
Berlin I think (and you'll find many
Timms in that area of Germany today). Like many Germans, quite a lot of
Timms left Germany in the early and mid 1800's through the port of
Hamburg.
Russell S. Timm