Hi,
I am searching for Bartz family information in the US too.
In the 1850 census recors ist mentioned:
Johna Bartz, 42 years old, born in Germany with his wife and 4 children und 3 other Bartz persons.
Further Bartz families that lived in Ohio and moved on:
Bernard Bartz, born 1801 in Keldung, Germany and his wife Catharina and 5 children lived around 1846 in Ohio and later moved to Michigan.
Johann Bartz, born 1799 in Keldung, Germany and his wife Margaretha and 6 children also lived around 1846 in Ohio and later moved to Wisconsin and Minnesota.
As the Bartz family name is very common in Germany and the US I am only do searches about Bartz family that are original from the state Rheinland-Pfalz, Germany, and espacially from the Rheinland area.
Greetings from Germany