Marcia, I do not have any dates of birth for John Adair or Benjamin Adair. According to information I have found they were in Maury Co., TN in 1811 and Benjamin was a grown man at the time. John Adair bought land in Maury Co. in 1811 and that is the year my gg-grandmother, Lucretia Adair was born. She married Jacob Darden Gardner and was living with my g-grandfather and g-grandmother in 1900 in Hickman Co. There has been some work done on Andrew M. Adair b. 25 June 1815, who was the son of Benjamin.