I have 8 children listed for Samuel and Dorcus. 7 sons.
The 3 that might help are Isaac b.1809 m.Hannah Taylor, no children shown named Isaac.
Isaiah C. b. abt 1804 m.Nancy Emert, no children shown named Isaac.
Levi b. 5 May 1803 m. Barbara Taylor. I list 12 children. One was Isaac Franklin, I do not show a wife
best I got. Good luck. Tom