Notes:
1920 Census, PA, York Co., Borough of Hanover, Ward #3 ED 60, Sheet 13B, 12 Jan 1920
Mumma, David J., head, 33, married, b. MD, father b. MD, mother b. MD, blacksmith
" , Margaret A., wife, 24, married, b. PA, father b. PA, mother b. PA
" , Lester J., adopted son, 3 3/12, single, b. PA, father b. PA, mother b. PA <====== Adopted
" , Kenneth J., adopted son, 5/12, single, b. PA, father b. PA, mother b. PA
" , Harry J., brother, 27, single, b. MD, father b. MD, mother b. MD, blacksmith
" , David (K. or M.), father, 74, b. MD, father b. MD, mother b. MD
1930 Census, PA, York Co., Borough of Hanover, Ward #1, ED 67-28, Sheet 23B, no date
Mumma, David J., head, 42, m. @ age 27, b. MD, father b. MD, mother b. MD, blacksmith
" , Margaret E., wife, 35, m. @ age 19, b. PA, father b. PA, mother b. PA
" , Lester J., son, 16, single, b. PA, father b. MD, mother b. PA
" , Kenneth J., son, 10, single, b. PA, father b. MD, mother b. PA
Mumma, Emma E., sister-in-law, 27, single, b. PA, father b. MD, mother b. MD
" , Bertie J., mother-in-law, 63, widow, b. MD, father b. PA, mother b. D.C.
The fact that Lester Jay Mumma was adopted was confirmed through DNA analysis as part ot the Mumma surname DNA project.