I have a Johann Gottlieb Baas ( b. 22 Jan 1798 - Wender Aut Wollin, Pommern, Germany d. 17 May 1874) who was the son of Johann Baas and Anna Maria Jancke. He married twice: to Regina Pluedemann (1 daughter Karoline Wilhelmine b. 1829 in Pritter auf Wollin) and later to Fredericke Charlotte Christine Karstaedt 3 children - Ernst Christian August b. 1851, Emilie Pauline Augusta b. 1852 (she married Johann Kohl and had at least 2 children - Anna b. 1886 and Adur b. 1890 both born in Milwaukee, and Louis Emil Henrich b. 1855.
Are these your people ?