I've been working on my line (FRANS) as well and there's tons of 'John's' all down the line. Other name variances in reference have been FRANCE and FRANZ. There seems to have been an uprooting to Meade County KY from Henry/Patrick County VA. I'll drop here what I've pieced together from Father to Son.
John Frans Birth: abt 1638
John Frans* Birth: abt 1734 Death: 1778-1788 Henry County VA. Marriage: abt 1755 Mary Wilkinson (Critz?) - Henry County VA.
John Frans^ Birth: bet 1764 and 1768 Henry/Patrick County VA. Death: bet Mar and Sep 1842 Meade County KY. Marriage: 18 Apr 1791 Elizabeth Stovall (Clark - widow) - Henry County VA.
Tazwell Frans Birth: 12 Aug 1801 Patrick County VA. Death: 22 Jan 1864 Agency, Buchanan County MO. Marriage: 12 Aug 1824 Ruann Hardin - Meade County KY.
Then my lineage continues on into Cass County Nebraska.
*(also, father of Henry Frans who married Sarah Carter) ^(also had a son named John Frans Birth: Sep 1798 VA. Death: 23 Nov 1872)
I've also run aground with the first John Frans (1734-1788) in Henry County. There seems to be more than one John Frans in that area, or he was remarried more than twice. I've found 2 wills and deeds online that make reference to different wives and children as well. Plus I can't find more than his father's birth date. Hope this helps some. :)