The Old Colony Historical Society in Taunton (Bristol County) has extensive archives relating to the name Dean. John and Walter were the original white settlers in Taunton, Mass.
I was born in Taunton in 1942 son of Charles Dean Jr (1910-1990). My grandfather was Charles A Dean 8/6/1877-10/16/1947. My great-grandfather was Charles H Dean born in Rockland Maine 1837-1890.
I just returned from a visit to Rockland, Maine and I hit a dead end there. Town records were very incomplete for that period.
My brother has the original family Coat of Arms, handed down by our father, which has the original spelling of the name DEANE.