Fess name from Switzerland

One of my lines comes from Switzerland. Her name is Francis Fess. This woman married a James Kelly. I do know that her year of birth was abt 1813 in Pennsylvania. Her parents came from Switzerland.

The first place I have them married is 1850 on a census from Alleghney County Pa.

Together they had 6 children of which one married my Thomas Brennan.

It's possible her brother could have been a Rudorf Fess. (first name maybe spelled wrong,we all know how census takers can be). I have him on a 1870 census living in the same county as her. He was age 67. She would have been 57 at that time.

He was born in Switzerland. Being 10 yrs older he could been born there.