Of the 10 major Coatney / Courtney families in the U.S. 5 have tested for Y-DNA and 3 more are hopeful.Y-DNA is a valuable tool to break through those "brick walls".
The Courtney Surname Project is at Family Tree DNA, who has the largest database of Y-DNA in the world.
If you have any questions you can ask them here or you can email me at [email protected]
I do not sell test DNA kits, nor do I make any money from the sale of test kits. I am strictly a volunteer for the Courtney Surname DNA Project.