Village of Grossalmerdo

Grandfather Louis Georg Conrad Stocker's Certificate for Naturalization (in
1907) indicates that his two minor children were living in the village of
Grossalmerdo. The spelling may not be exact since I can't find it in any
online search site. The only clues I can offer are that-1) The children were
living with Louis' sister and that her husband was a Forrester. 2) The
village may be near Frankfurt Am-Main and from pictures we have, (ca 1907-08)
appears to be in a remote location. Although the village name was written as
one word on the certificate could it be two words? Grandfather was born in
Wunsdorf, Hannover so I suppose that area cannot be ignored.

Thanks for any help,

George