Notes:
Data source is "The Brenneman History", 1938 by Albert H. Gerberich, p. 132. Mennonite Publishing House, Scottdale, PA
The above source suggests they are buried in the "private burial ground on the Kaylor farm near the Lincoln Highway east of Columbia, PA."
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Information from Jack W. Singleton
Concerning Barbara's gravesite: the information is on microfilm roll #213 part 3 of the Gerberich collection, a copy of which is at Lancaster County Historical Society. The survey was done 1935. I also found her father, Frederick's record. It is in vol. 13 "Tombstone Inscriptions From Lancaster County Graveyards" by William Frederick Worner done 1942. Frederick Gram's dates are Nov. 12,1773 - Feb.28,1855. Frederick is buried in Fowlers Cemetery located 1 mile east of Columbia, Pa. and 500 yards south of route 462. It appeared abandoned in 1942. I am going to try to find it,
but it may be under a shopping center by now.
I'll see what I can find concerning the children of Phillip Mumma. And I have not come across the Mumah spelling in my research.
CORRECTION---- 27 Jul 2011)
Doug, I gave you the wrong name of the cemetery for Frederick Gram November 12, 1773 - February 28, 1855 and wife Barbara Brenneman Gram. It should be Forrey Cemetery.( not Fowler's) Prospect Rd., It was moved in 1986 when St. Annes Home was expanded. Sorry for such a stupid error. Jack Singleton