Data source is "The Mumma Family" by Samuel H. Mumma 1962 & Moomaw book 1990
Data source is the pamphlet, "Genealogy of One Branch of the Jacob Mumma Family", written by Ellen Landis Mumma in 1970.
Listed in the Brubacher Genealogy in America, 1884, p. 195
http://ia700303.us.archive.org/33/items/brubachergenealo1884brub/brubachergenealo1884brub.pdf
It is unclear why Fanny moved to Derry Township. in the 1840 & 1850 census
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1840 Census, PA, Dauphin Co., Derry Twp., p. 200
Widow Muma, 1 male under 5, 1 male 5-9, 1 female under 5, 1 female 5-9, 1 female 15-20 (probable error in Widow Muma's age - should have been 20-30).
1850 Census, PA, Dauphin Co, Derry Twp., p. 133, 29 Aug 1850
Fanny Mumma, 41, b. PA
Elizabeth " , 19, b. PA
Fanny " , 13, b. PA