The Dr. Dan Turney who died 1827 Franklin co Ohio (wife Janet Sterline Denny) was son of Henry Turney who died 1812 Chillicothe Ohio.
Henry was a brother to your John Turney (wife Magdalina Grove) so Dr. Dan was a first cousin to your Daniel Turney.....
John and Henry were both sons of Daniel Dorney/Turney (died 1779 Northampton Co PA) and Elizabeth Jarrett.
Daniel Turney had a brother Henry (his line mostly used Dorney spelling and stayed in PA), and a brother Peter bp 1710/11 Switzerland who I descend from.Peter stayed in PA till about 1749 when he moved into Shenandoah Valley of VA and then his line moved to Kentucky and Tennessee from there.
I think most of the western PA Turneys come from Daniel who arrived Philadelphia in 1740.He left a will in PA naming his children so this line (except for the same names as the other lines) is easier to follow.His brother Henry died interstate so that line is a bit harder.
Marianne Turney has done a lot of research on your John Turney / Magdaline Grove line.