you asked "...note on DNA. So, how do I do the test so that it is linked to the data that was in the link."

The yDNA test done for kit #225876 was done by familytreedna.com and when the results were obtained, the subject joined "The Koehler DNA Project" and supplied the results to the administrator there. You don't have to join a project, but it does help other researchers to find matches with your results. Otherwise, the company will keep your results private, though they will let you know when matches happen and you can email the matching subject through the company. You can either go directly to familytreedna.com to order and learn more about the test, or else use the link "Order Test" at http://www.worldfamilies.net/surnames/koehler.

The price goes up and down. Sales are frequent. If funds are limited, you may want to start with the 12-marker test, probably around $40 or less at this time, which would be enough to see whether you might match kit #225876 [descendant of George Caylor, Sr. of Blount] or if you match one of the other men from families with the surname that sounds like Kaylor. You can always choose to upgrade later - the company can use the same sample to extend the test to more markers.

Usually, the 25 or 37 or more marker tests are helpful only after you have discovered someone with a similar surname who matches (or has a near match, only 1 step away from your results). That previous statement does not apply with very common surnames, or with very common y-DNA patterns. However, if you match at the 12 marker level with someone with the surname that sounds like Kaylor and whose male lineage family has lived in North America since before the 1850s, you'll probably want to extend a 12-marker test to more markers. I say that because then you'll be better able to decipher how near you and your match are to the common ancestor.