Data source is the pamphlet, "Genealogy of One Branch of the Jacob Mumma Family", written by Ellen Landis Mumma in 1970.
data source "Genealogical Record of Rev Hans Herr and his direct lineal descendants by Theodore W. Herr, Lancaster, PA 1908. p. 163 & 367
Anna Hoffman and Christian are identified in the Brubacher Genealogy in America, 1884 on page 155 and 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, Daupihin Co, Derry Twp., p. 133, 29 Aug 1850
Fanny Mumma, 41, b. PA
Elizabeth " , 19, b. PA
Fanny " , 13, b. PA
It appears that Christian is living with his uncle, Christian
1850 Census, PA, Dauphin Co., Lower Swatara Twp., 22 Oct 1850, p. 135B
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Christian Mumma, 39, M, farmer, $6000 real estate, b. PA
Ann " , 34, F, b. PA
Christian " , 18, M, b. PA <= Possibly Christian is living with his uncle, Christian
Ann " , 18, F, b. PA
Martin " , 8, M, b. PA
Samuel " , 6, M, b. PA
Mary " , 5, F, b. PA
Elizabeth " , 4, F, b. PA
Ann " , 2, F, b. PA
Fanny " , 6/12, F, b. PA
1860 Census, PA, Lancaster Co., East Hempfield, p 264
Christian Mumma, 26, Farmer, $2629 personal, b. PA
Ann " , 22, b. PA
Fyanna " 9/12, b. PA
Eliza Plow, 22, servant, b. PA
John Garrett, 14, Farm laborer
Jacob Mouk, 13
[Note: His brother, Jonas is living 2 doors away with the Jacob Grider family.
1870 Census, PA, Lancaster Co., East Donegal Twp.,
Mumma, Christian, 37, Farmer, $2910 personal., b. PA
" Anna, 35 Keeping House, b. PA
" , John, 14, farm hand, b. PA (John Baer)
" , Susan, 13, b. PA (Susan Baer)
" , Simon, 5, b. PA
Carter, Joseph, 19, farm laborer.
1880 Census, PA, Lancaster co., East Hempfield, p. 13
Mumma, Christian, Farmer, b. PA/PA/PA
" , Annie B., 44, wife, keeping house, b. PA/PA/PA
" , Simon H., 15, son, at home, b. PA/PA/PA
Baer, John H., 24, step son, laborer, b. PA/
1900 Census PA, Lancaster Co., East Hempfield,
Mumma, Christian, head, b. Mar 1833, 67, m: 36 yrs, b. PA/PA/PA farmer
" Annie B., wife, Sept 1835, 64, m: 36, 1 child, 1 living, b. PA/PA/PA
" Simon H., son, b. May 1865, 35, single, b. PA/PA/PA, farm laborer
1910 Census, PA, Lancaster Co., East Hempfield, p. 218 - Church Street
Mumma, Christian, head, 77, m2, 43 yrs, b. PA/PA/PA, farmer, general farm
" Annie, wife, 74, m2, 43 yrs, 3 children, 3 living, b. PA/PA/PA
" Simon, son, 44, single, b. PA/PA/PA, laborer odd jobs