now so he was from South-Tyrol - Trentino - Alto Adige. it was lost after WWI 1919 from the austrian-hungarian empire to Italy:http://en.wikipedia.org/wiki/Trentino-Alto_Adige/S%C3%BCdtir...http://en.wikipedia.org/wiki/History_of_South_Tyrol
Bozen/Bolzano and Trient/Trentohttp://en.wikipedia.org/wiki/Province_of_Bolzano-Bozenhttp://en.wikipedia.org/wiki/Province_of_Trento
so from one of them your ancestor was from.
what was his name? Trento is of more italian and Bolzano more of german people.