Notes:
Data source is Beverly Straub Watkins. E-mail BLStraub@shaw.ca
The data provided by Beverly came from a handwritten Ritter biography done in 1911. From the census data, it appears Issac married Sarah and they migrated to northern Pennsylvania, living for a while in Tioga County, eventually moving to Lycoming County where Sarah and Isaac died. The name was also spelled as Mumaw.
1850 census PA, Lancaster Co., West Earl Twp., 26 Aug 1850
Henry Mumma, 49, laborer, b. PA
Mary Mumma, 48, b. PA
Sarah Mumma, 21, b. PA
Isaac Mumma, 20, b. PA
William Mumma, 19, b. PA
Lewis Mumma, 18, b. PA
1870 Census, PA, Tioga Co., Liberty Twp., Liberty P.O., p. 266
Mumaw, Isaac, 40, works on grist mill, $500 personal, b. PA
" , Sarah, 42, keeping house, b. PA
" , Mary, 16, at home, b. PA
" , George, 12, at home, b. PA
" , Emma, 10, at home, b. PA
" , Thomas, 8, b. PA
" , Elizabeth, 6, b. PA
" , Harry, 5, b. PA
1880 Census, PA, Lycoming Co., Lewis Twp., Trout Run Village, p. 177, 29 June
Mumaw, Isaac, 49, works in stave mill, b. PA/PA/PA
" , Sarah, 53, wife, keeping house, b. PA/PA/PA
" , George F., 20, son, works on farm, b. PA/PA/PA
" , Edward T., 15, son, works in stave mill, b. PA/PA/PA
" , Elizabeth A., 14, dau, at home, b. PA/PA/PA
" , Harry B., 12, son, works on farm, b. PA/PA/PA
1880: Trout Run, Lycoming, Pennsylvania
Isaac Minnard 49
Sarah Minnard 53
George F. Minnard 20
Edward T. Minnard 15
Elizabeth A. Minnard 14
Henry J. B. Minnard 12
1900 Census, PA, Lycoming Co., Lewis Twp., p. 199
Mumma, George, head, Jan 1859, 41, m. 8 yrs, b: PA/PA/PA, sawyer lumber mill
" , Mary, wife, Mar 1866, 33, m 8 yrs, b: PA/PA/PA
" , Sarah, dau., May 1894, 6, b. PA/PA/PA
" , Florence, dau, Nov 1897, 2, b. PA/PA/PA
" , Anna, dau, May 1900, 1/12, b. PA/PA/PA
" , Issac, father, Dec 1831, 68, b. PA/PA/PA