Hello,
Weinfurt´s are sure from this area between Blatna, Pilsen, Klatovy and Horsovsky Tyn. What is interesting are the applications at the police headquarters in Prague (1850 – 1914). There is Martin Weinfurt, born 1832 in Borovy (near Prestice), m. Anna Riha, but died 30.3.1890 or 30.3.1889 in Prague.
It will be a relative, but it is not our Martin.
David