Franz Grow from Fischausen

Most if not all of the queries posted in this forum deal with Grows who came to America long before my grandfather did, which makes finding information on his parents even harder.My grandfather's name was Harry Albert Frank Grow, and he was born in 1886 in Koenigsburg, East Prussia.His father's name was Franz Grow and his mother's maiden name was Ambroscheit.I was looking for the possibility that this line is related to the Grow families that journeyed to America prior to Harry who came in 1913.Harry was an only child, but I know nothing about his grandfather.I do know that Franz and his wife moved to Koenigsburg from Rantau Krs. Fischausen.I have a lot of old photos and a fair amount of information that I would be happy to share with people researching this line.