See my speculative descendancy chart for the Koller's of southern York County, Pennsylvania.
See KOLLER/KOHLER church records for Friedensaal and Fissel's Church here:
This .rtf file is a descendancy chart for John Koller (1752-1815) apparently compiled by Mrs. Lorraine E. (Snyder) Solar of New Jersey:
I think the family information for John's son Jacob Koller (1781-1858) included in this chart may be incorrect; the children of Jacob Y. Koller (1798-1868, s/o Jacob and Barbara) appear to be mistakenly assigned to Jacob (1781-1858).
Pictures of gravestone at Fissel's:
http://kohler.homestead.com/Kohler.html