It's been a VERY long time since I worked on the Heater-Heeter (Heter?) family, but without checking my information and from poor memory will speculate that it is likely your John is a son or at least a nephew. Both Revenna, Portage Co. and Trumbull Co., Ohio have connections to my line(s).
I will try to do some checking today and get back to you soon. Big project going at moment, but I'm very interested in your probable connection.