Frank "Franz" Seidel was born to Franz Seidel Sr. and Veronica "Clessesny" Seidel.
Franz Seidel Sr was born in 1775 in Grodkow, Opole, Poland and died in Germany.
He married Veronica Clessesny who was born in 1790 and also born, and died, in the same town and State as Franz.
I am unable to find any records as to their parents.