Biographical Sketch (1997):855, p. 13. "John, born in 1750 in Bern Township, Berks County, and christened 11 March 1750 in Bern Reformed Church. His sponser was John Conrath."

1750 Baptism:1249, p. 125. As her authority, Burgert cites Bern Reformed Church, Bern Township, Berks County, Pennsylvania.,2045, p. 334. As his authority, Humphrey cites the records of Bern Reformed Church, Bern Township, Berks County. Johannes Stamm baptised on 11 March 1750 at Bern Reformed Church, Bern Township, Berks County to parents Winer Stamm and wife.

1790 U.S. Census:97, p. 28. John Stamm not enumerated along with his father Werner and brothers Frederick and Nicholas Stamm in Bern Township, Berks County, Pennsylvania.