Notes:
1910 Census Columbiana Co., Liverpool Twp., ED 17, Valley Road, dwelling 177
Mumaw, Carl L., head, 18, m1, 0 yrs, b: OH/OH/OH, salesman, retail sales
Minnie B., wife, 18, m1, 0 yrs, no children, b: IL/IL/IL
1920 Census, Columbiana Co., East Liverpool twp., ED 200, dwelling 388
Mumaw, Carl L., head, owns, 28, b: OH/OH/OH, labor, Engineer
Elizabeth B, wife, 27, b: OH/PA/PA
Allice J., dau, 9, single, b: OH/OH/PA
Helen V., dau, 7, single, b: OH/OH/PA
William D., son, 6, single, b: OH/OH/PA
1930 Census, Columbiana Co., Liverpool Twp., East Liverpool City, ED. 15-13, 1845 Ohio Ave, dwelling 614
Mumaw, Carl, head, owns $3200, has radio, 38, 1st m @ age 18, b: OH/OH/OH, engineer, pottery
" , Elizabeth, wife, 37, 1st m @ age 18, b: OH/PA/PA
" , William, son, 16, single, b: OH/OH/PA
" , Leah Jean, dau, 7, single, b: OH/OH/OH
Cramer, Helen, dau, 18, widowed, b: OH/OH/OH, wire brusher, pottery
Social Security death index
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CARL MUMAW b: 14 Jul 1891, d: Mar 1982, last payment to zip 43920 (East Liverpool, Columbiana, OH) SSDI# 280-01-8653 issued in Ohio
ELIZABETH MUMAW b: 18 Jun 1892, d: Feb 1976, last payment to zip 43920 (East Liverpool, Columbiana, OH) SSDI# 280-01-8646, issued Ohio
WILLIAM D MUMAW b: 27 Dec 1913, d: 04 Sep 1994, last payment to zip 43920 (East Liverpool, Columbiana, OH) SSDI# 297-07-8933 Ohio
{My guess is the following was William D. Mumaw's wife.}
MAUD MUMAW b: 28 Feb 1916, d: 16 Feb 2003, last payment 43920 (East Liverpool, Columbiana, OH) SSDI# 280-01-3314 issued Ohio