I found an old phone directory that listed Wilma J. Wilch living in Washington with a Stella L. Wilch, widow of Fred Wilch.
http://search.ancestry.com/cgi-bin/...CATEGORY&h=840135577&db=USDirectories&indiv=1
1910 Census for family
Name: Stella Wilch
Age in 1910: 30
Birth Year: abt 1880
[1880]
Birthplace: Iowa
Home in 1910: Spokane Ward 1, Spokane, Washington
Race: White
Gender: Female
Relation to Head of House: Wife
Marital Status: Married
Spouse's Name: Fred E Wilch
Father's Birthplace: Illinois
Mother's Birthplace: Kentucky
Neighbors: View others on page
Household Members:
Name Age
Fred E Wilch 34
Stella Wilch 30
Donald Wilch 6
Cleone Wilch 2
1920 Census for the Wilch family
Name: Stella Wilch
Age: 39
Birth Year: abt 1881
Birthplace: Iowa
Home in 1920: Spokane, Spokane, Washington
Race: White
Gender: Female
Relation to Head of House: Wife
Marital Status: Married
Spouse's Name: Fred Wilch
Father's Birthplace: Mississippi
Mother's Birthplace: Kentucky
Able to Read: Yes
Able to Write: Yes
Neighbors: View others on page
Household Members:
Name Age
Fred Wilch 44
[49]
Stella Wilch 39
Donald Wilch 16
Cleone Wilch 12
Jarmon Wilch 9
Father's death
Name: Fred Edwin Wilch
Gender: Male
Birth Date: abt 1876
Death Date: 11 Sep 1936
Age at Death: 60
Death Location: Spokane, Spokane, Washington
Father: Phillip Wilch
Record Source: Washington State Death Records
Brother Donald's birth with mothers maiden name
Name: Donald E Wilch
Date of Birth: 20 Aug 1903
Gender: Male
County: Whitman
City: Pullman
Father's Name: F Wilch
Mother's Name: Stella Rainwater
Brother's death
Name: Donald Wilch
SSN: 540-14-5951
Last Residence: 83850 Pinehurst, Shoshone, Idaho, United States of America
Born: 20 Aug 1903
Died: Oct 1985
State (Year) SSN issued: Oregon (Before 1951)
Sister Cleone's birth
Name: Cleone Imogene Wilch
Birth Date: 30 Sep 1907
Location: Whitman
Sex: Female
Race: White
Father's Name: Fred K Wilch
Mother's Name: Stella Rainwater
Image Filename: 0821
Sister's marriage
Name: Cleone I Wilch
Age: 65
Est. Birth: abt 1908
Spouse Name: Carl M Petersen
Spouse Age: 77
Est. Spouse Birth: abt 1896
Date: 1 May 1973
Location: Alameda City
Brother Jarmon's death
Name: Jarmon Jerry Wilch
Gender: Male
Birth Date: abt 1910
Death Date: 31 Oct 1931
Age at Death: 21
Death Location: Kirkland, King, Washington
Father: Fred Wilch
Father's Birth Place: Ohio
Mother: Stella Rainwater
Mother's Birth Place: Iowa
Record Source: Washington State Death Records