I am trying to find more information on Johann Martin Hartmann, born about 1794 in Altenrode, Darlingerode, Germany. He married Joh. Christiane Henr. Boettcher in 1818. She is the daughter of Joh. Andr. Boettcher and Soph. Elisab. Truempelmann. Johann Martin Hartmann is the son of Heinrich Martin Hartman and Soph. Cath. All of these people were from Altenrode, Darlingerode, Germany.
Any information will be greatly appreciated.