One of the Davenport lines in America originated with Davis Davenport born about 1660 in Virginia. Parents unknown. Davis is believed to have six children - Martin, Thomas, Ann, John, Richard, and Elias. One of the theories is that this line came from Ireland. No proof found yet.
I am the administrator of the Davenport Surname DNA Project. One of our goals is to obtain DNA samples from Davenports around the world to see how we are related. We are trying to get participants in Ireland to see how they compare to our Davis Davenport and other Davenport lines. If you are a Davenport or know a Davenport you can find more information at http://www.DavenportDNA.com
or contact me directly at firstname.lastname@example.org