Notes:
Data source is Richard Mark Mumma. (Deceased)
1910: Steelton Ward 3, Dauphin, Pennsylvania
David F Keller 37, plumber, general work
Emma L Keller 32, m: 6 yrs, 2 children 2 living
Joseph M Keller 5
Mary M Keller 3
Catherine Mumma, mother-in-law, 12 children, 7 living, 69
Norman H Mumma, brother-in-law, 33
1920: Steelton Ward 3, Dauphin, Pennsylvania
Lincoln Street
Davis S Keller 47
Emma L Keller 42
Joseph M Keller 15
Mark N Keller 12
Norman H Mumma, brother-in-law, 43
1930: Steelton, Dauphin, Pennsylvania
242 North Second Street.
David S Keller 57
Emma L Keller 52
Joseph M Keller 25
Mark M Keller 23
1940: Steelton, Dauphin, Pennsylvania
242 2nd St.
Residence in 1935: Same House
David Keller 67
Emma L Keller 63
Mark Keller 37