James Gaddis,
The parentage of William Gaddis comes up, with the same claims repeated again and again without any supporting evidence, although it's the first time I've seen him being born in Boyndie. Has new evidence turned up? And there's another William Geddes bpt 13 Mar 1715 also in Boyndie, so why is one chosen over the other?
The most considered summing up I've seen is:
"This family was founded in Fayette county, Pennsylvania, by Robert, John, Henry, and Thomas Gaddis, sons of William Gaddis, who came from Apple Pie Ridge, near Winchester, Virginia, to Fayette county, about the year 1780. William Gaddis was of Irish parentage, and probably came to Frederick county, Virginia, with the Irish immigration of 1737-40; at all events he was a landholder in 1750, as transfers show. He married Priscilla, daughter of Henry Bowen, who survived him, and after her husband's death joined her children in Fayette county." - "Genealogical and Personal History of Fayette County Pennsylvania, Volumes I-II:".
The variation on Geddes of Gaddis seems to me to be always Irish based and never Scottish based.
However, re William Geddes bpt 4 Sep 1718: he was born in Blackpots, Boyndie to James Geddes & Anne Smith. Analysis of the OPR shows there were three contemporary family groups: John Geddes & Helen Hacket, James Geddes & Anne Smith, and William Geddes & Jean Smith.
I believe they were brothers. John Geddes ended up in Nether Dallachy farm and James Geddes in Upper Dallachy farm, implying they were by then farmers. William Geddes flitted around, implying he was a farm labourer. They seem to have their origins in Whitehills, maybe even Blackpots itself, and spread out into the hinterland. Blackpots in particular suggests seafolk connections, strengthened by witnesses being fisherfolk Watsons and Lovies in Whitehills, Boyndie
There's no evidence of emigration of anyone in these three families, although that's not to say it didn't happen. But there are one or two hints that some in these families moved to nearby Auchmore, with a William Geddes there in 1752 and later, who could be one of the two from Boyndie. With all these possibilities and uncertainties, it's more likely for Boyndie's William Geddes to have moved a couple of miles to Auchmore than a couple of thousand miles across the Atlantic. Unless there's evidence.
It's a poser for you James!