Hi Jenn,
I wrote a response, but for some reason it didn't seem to post. (Or maybe I've now done it twice!)
I don't know from what part of this line that I descend. My furthest back is Alexander Robertson, born circa 1772, in Scotland, but I am unsure where. He was in the Royal Navy, and there are musters indicating different places ("Leith," "Glasgow," and a third just says "Scotland.")
I am searching among these Orkney Robertsons because y-dna testing places Alexander precisely among this line of Robertsons. I am nearly an exact match with three different men that descend from three different sons of Thomas/Euphan (namely, George, Thomas, and Edward), one of them from that second marriage of Edward/Christina Groat, and am also a dna match (not quite as close, but again nearly exact) with another man who descends from further back in these Orkney Robertsons, namely, James Robertson, who came to Orphir in 1630 from Perthshire, establishing this line of Robertsons in Orkney. He is no doubt also the ancestor of the Thomas/Euphan - George/Jean Gray line.
So, from this work, we know that my Alexander fits among these Robertsons, and that Thomas/Euphan the also descends from the 1630 James line. I have run out a pretty big tree descending from James 1630 down, but haven't yet figured out how George/Jean fit in, nor how my Alexander does. Though I know that they do fit together.
Does this make sense?! A challenge to explain without the trees available as a prop!
The help I need is filling in the Thomas/Euphan line down, and the Jame 1630 line as well, and identifying other currently living male Robertsons who might be willing to test to help fit these line together.
There is a dna page of the Orkney Robertsons available, and that I can forward to you if you are interested!
Paul