I have a Peter Wirth in my ancestry. His daughter Magdalena, b. 1830, married my great grandfather, David Jacob Meister, b. 1833 (Gampelen, Switzerland), in 1851. I have reference that Magdalena's birth and marriage to David took place in Switzerland. They came to America where their first child was born in Pennsylvania in 1852. I have searched for more information on Peter and Magdalena with no success. Would they possibly connect to your Wirth family?