My Grandfather (My Mothers Father) was Andrew Fenrich.
His Father was George Fenrich who was married to Elizabeth Schuler. Both were born in Germany and died in the U.S.A.
His Father spelled the name Fahnreich (I don't know his first name.) He was married to Schmidt, (don't know her first name). They were both born and died in Germany.
I am not sure why they changed the spelling.
We are from PA.
If this helps at all, let me know...