Notes:
Data source is Douglas Mumma, 2123 Farmington Place, Livermore, CA 94550, email = doug@mumma.org
The 1900 census appears to have the children's births mixed up a bit.
Jerome - Jun 1892 The SSDI lists his birth as 18 Feb 1894
Irvin - Mar 1894
Beulah - Jan 1898
The family is listed in the 1900, 1910, 1920 & 1930 census of Dayton Ohio. In the 1900 census John is divorced and living with his parents with the children
1910: 58
Birth Year: abt 1852
Birthplace: Ohio
Home in 1910: Dayton Ward 2, Montgomery, Ohio
Street: 4th St
Samuel M Mumma, head, 63
Mary M Mumnia, sister, 52
John F Mumnia, brother, 58
Jerome Mumnia 15
Irvin Mumnia 13
1920: Dayton Ward 4, Montgomery, Ohio
Jerome Blessing Mumma, head, 26
Wilhelmina E Mumma, wife, 21
Mariana D Mumma, dau, 2 10/12
Janet L Mumma, dau, 1 9/12
Jerome B Mummam, son, 6/12
Fred R Miller, father-in-law, 51
1930: Dayton, Montgomery, Ohio
Jerome B Mumma, head, 35
Wilhelmina Mumma, wife, 38
Marianna Mumma, dau, 13
Janet Louise Mumma, dau, 12
Jerome Mumma, son, 10
Gertrude Mitchell, roomer, 26
1940: Butler, Montgomery, Ohio
Jerome B Namma, head, 47, b: OH, operator motion pictures
??Helmina Namma, wife, 38, b: IN
Jerome B Namma, son, 20, single, b: OH repairman automobiles
Roxe Gumbrum, lodger, lodger, 36
Martha J Gumbrum, lodger, 59, widowed