1920 Sheffield, Hartford, CT Census: I find Julia Lafountain, a widow, with her children.
1910 Sheffield, Hartford, CT Census: I find William and Julia Fountain. This is his first marriage, her second. Married about 3 years. Youngest child, Rose/Rosie, of this marriage was born in CT, but there are several older children born in NY. I assume they were adopted by the new husband (possible name change). Age for both is given as 28 years, so birth around 1882. Eldest daughter, Julia N. is 10 years, so born about 1900.