About

1930 census:
2125 N. Commonwealth Avenue: (Value: $15,000): 1) George A. Knowlton, owner and head of household; 31 year old white married male; married at age 23; born in Massachusetts; father born in the US, mother in Massachusetts; a salesman in oil. 2) Frances Knowlton, wife; 34 year old white married female; married at age 25; born in Massachusetts; father born in Austria, mother in Massachusetts; not working. 3) Frances Knowlton, daughter; 8 year old white female; in school; born in California. 4) John A. Knowlton, son; 6 year old white male; in school; born in California. 5) George W. Knowlton, son; 4 year old white male; born in California.

1940 Census:
2125 Commonwealth Avenue (Rents for $30): 1) Clarence J. Coberly, head of household; white married male 24 years of age; born in California; mechanical engineer, pump manufacturing; earns $1,320. 2) Edith J. Coberly, wife; white married female 20 years of age; born in California; not working. 3) Clarence J. Coberly, Jr., son; white male newborn; born in California.