emmegrated to US in late 1800's

Does anyone know about the O'Shaughnessy family that emmegrated from Ireland to Wisconson in the late 1800s?

Hi! In my genealogy there are two womwen who emigrated to Argentina in 1857, Bridget Shaughnssy and Kathleen Saughnessy Dalton, maybe sisters fron Westhmeat,married with brothers Thomas and John Killian Gahan. Best regards. Marcelo Jovanovich (marcelojovanovich@hotmail.com). Patagonia. Argentina