1910 - 1940 Neither Blanch/Blanche nor Fred appear on this census anywhere.
1900 - Name: Blanche V Crowell [this is the only Blanch] Age: 9 Birth Date: Sep 1890 Birthplace: Minnesota Home in 1900: Mankato Ward 4, Blue Earth, Minnesota [Blue Earth] Race: White Gender: Female Relation to Head of House: Daughter Marital Status: Single Father's Name: John F Crowell Father's Birthplace: Indiana Mother's name: Mary M Crowell Mother's Birthplace: Minnesota Occupation:
John F Crowell 34, 6/60 IND Mary M Crowell 37, 10/62 MN Nina M Crowell 12, 6/87 MN Blanche V Crowell 9, 9/90 MN
Both Fred & Blanch may have used their middle names in subsequent years.
Did this family go to Canada??????????
TRY - Find a grave – FREE SITE - volunteer site all states; frequently has headstone pic
DO NOT SEARCH FOR A MARRIED WOMAN USING HER MAIDEN NAME.