Thaddeus Dann,born Jul 17, 1772,did marry a Sarah Brown. I've been doing research and Alfred Dann ,born abt 1807 and d. sept. 24, 1873,is my husbands g.g.g. grandfather. Alfred's son, Charles Henry Dann was born mar. 26, 1833 and d. oct. 27, 1922,in Fulton, Oswego, NY.