Hello - Claville is a rare surname, it seems. I looked briefly at the 1920 census index and only found 5 Claville names. None matched the names you provided. However, a search for “DeClaville” has turned up some of your family in both 1920 and 1930.
1920 Census for Chicago, Illinois ED 919 3254 North Avenue Declaville, Aliceage 50widowed born Denmarkparents born Denmark Declaville, Anton age 27 son born Illinois (says his father born in France?)
1920 Census for Newburgh Heights, Cuyahoga, Ohio ED 560 Declaville, Ernest age 68 widowed born Denmark parents born Denmark
1930 Census for Chicago, Illinois ED 1183 Declaville, Anton J., age 37 head born Illinois parents born Denmark Declaville, Hildaage 35wife born Iowa parents born Denmark
1930 Census for Warrenville, Cuyahoga, Ohio ED 716 De Claville, Ernstage 79 born Denmark (Note - He seems to be an inmate on a prison farm?)