Recent Big Y700 testing at FTDNA has shown that a male-line descendant (not on Wikitree) of John Swint (https://www.wikitree.com/wiki/Swint-34) and a male-line descendant of Johann Jost Schwind (https://www.wikitree.com/wiki/Schwind-320) are both in haplogroup Q-FT276374, with a most recent common ancestor somewhere around 400 years ago. This strongly suggests that John Swint, who died in Georgia in 1801, was an immigrant (or descendant of an immigrant) from central Germany (Johann Jost Schwind died 1729 in northern Hesse). The details of the relationship betweeen John Swint and Johann Jost Schwind, however, are still unknown (in particular, the paper trail demonstrates that John Swint was not a descendant of Johann Jost Schwind, as all male-line descendants of Johann Jost to 1800 are accounted for).
The Q-FT276374 haplogroup is a clade of haplogroup Q-F1893, which is quite rare. Thus, if you have the Swint or Schwind last name (or a variation thereof, like Geschwind), a Y37 test at FTDNA will be sufficient to determine whether you are in the same family as John Swint of Georgia and Johann Jost Schwind of northern Hesse.
We therefore invite anyone with the Swint or Schwind last name who is interested to have the basic Y37 test and join the Swint project at https://www.familytreedna.com/groups/swint. In particular, it would be nice to see whether descendants of other Swint/Schwind immigrants to the U.S. are part of the same group, and also whether members of the Schwind families in southern Hesse (Hanau area), northwesternmost Bavaria (Aschaffenburg area), and the Palatine (Schifferstadt and Bad Kreuznach areas) are part of the same group.