I was able to have Jeffrey to upload his AncestryDNA results to the 3rd party site GEDMatch. Here are the results of the comparison of our DNA:
GEDMatch shows us matching on 8 segments and 192.4 cM. The differences between AncestryDNA and GEDMatch are due to the cutoff minimum in GEDMatch to be counted as a matching segment.
As you can see, Jeffrey and I match on chromosomes 4,5,6,8,15,18 & 21. We have a break in chromosome 6 with two long stretches of shared DNA.
Next, I compared Jeffrey's results with that of my first cousin Debbie to see where they matched each other.
I also compared Jeffrey to my dad, to see what DNA they share together.
Jeffrey and my dad share 11 matching segments and 344.5 cM of DNA, much more than he shares with Debbie or myself. The chromosomes they match on are 3,4,5,6,7,8,10,15,18 & 21 - including two sections on chromosome 6, just like he shared with me.
The common ancestry of all of us testing above are the LeMaster and Wehrly lines, so the DNA we share has to come from these branches or upline from them. Right now chromosome 6 seems to be behaving very interestingly.
I'm beginning to collect data on matches that I share from the three testing sites to chart out an mark which DNA is coming from which side of the family. This will come in handy for helping those distant matches that triangulate with us in finding the common ancestors.