The genealogical data with which the SFA began was originally collected by Reverend Henry O. Sheldon, a circuit preacher, as he rode from village to village in the 1800s. Rev. Sheldon documented five apparently unrelated Sheldon families dating back to Colonial times; SFA members are descendants of these five families. Over the years, this original information has been researched and has been continually updated. It now contains over 70,000 names, including Sheldon (Shelden) spouse data.