Two of my grandmother's cousins in Iowa married men named Davenport. I always suspected these men were related. I traced each of them back to two Davenport families in Erin, Chemung, NY: Samuel Davenport, b. c. 1806 (married Ann Unknown) and William Davenport, b. c. 1816 who lived a few farms away (married Harriet Losee or Losse). These two men were almost certainly brothers. They named children after each other, their descendants rented rooms from each other, attended each other's weddings, etc. William left Chemung County around 1852, living in De Kalb Co, IL where most of his children were born. Samuel and was reunited with William's son William Henry Davenport (1843-1928) when both moved to Humboldt Co, IA by 1870 (Samuel appeared to move there directly from Erin).

Can anyone identify the common ancestor of Samuel and William Davenport?

Thanks, Tim Hall