My name is David Heydorn, I understand that my Great Grandfather came
from a village near Hannover called Klein Heidorn his name was also
Heidorn before it got changed to Heydorn I am told.
Yes, this is the village of Klein Heidorn or Kleinheidorn. Heidorn and Heydorn are two spellings of the same surname that were used interchangeably in the old days. Heydorn would be the more archaic spelling.
I also have heard that there are some records(very old) in a Church
near to or in klein heidorn.
Kleinheidorn belonged either to the parish of Idensen or Wunstorf, my source is ambiguous.
=Jim