Hi, I believe that for to find your Ettore/Ercole Dozzino/a birth you can search in Celico civil records by LDS microfilms
Registri dello stato civile di Celico (Cosenza), 1809-1910 Celico (Cosenza). Ufficio dello stato civile
http://www.familysearch.org/eng/library ... ++di++Celi++
this surname, also in various spelling, never existing in all Cosenza province from 1800 to 1900 and also currently, nobody have this surname or surname versions in all Italy, so, only searching in Celico birth you can descover more abt your ancestor ...
hoping helpful,
suanj
PS however by ancestry.com seeming that Ercole died in 1965:
Wisconsin Death Index, 1959-1997
about Ercole Rozzoni
Name: Ercole Rozzoni
Age: 77
Sex: M (Male)
Birth Date: abt 1888
Death Date: 22 Feb 1965
Location: Keno (May be abbreviated)
Certificate: 004257
maybe Ercole/Ettore born in Celico as by ship's manifest and raised from Mantovano family in Rota Greca ( no Mantuano); in Rota Greca was 2 families Mantovano surname;
households:
Mantovano Camillo b. 07/04/1864 ROTA GRECA
Mantovano Dionisio b. --/--/1853 ROTA GRECA