My great grandfather's brother Santino Castoldi married a Caroline Buonlamperti. Via Ellis Island records, Carolina came to Walla Walla, WA in 1921 because she was to wed Santino. In these records she lists Riccardo Buonlamperti as her father and that she was from Sant'antonino. Don't know if there is any connection for you, but thought this tid bit might be of some use.

Katie
katie.burke@charter.net