I think we may be related through the Rumer line. I am descended from Henry Coler and his wife Margretta Rumors (as her name appears in a family record), who appears to be a daughter of Henry Rumer and his wife Dorothy, of Montgomery County, Pennsylvania. I located a transcript of Henry Rumer's will that mentions a daughter who was the wife of Henry Coler (I believe the record you posted regarding the will has the name as Coates). The will also mentioned a son Henry. The family record I have also said Margretta had a brother Jacob.
Margretta Rumors Coler named her oldest daughter Dorothea. The Coler family moved to Virginia from Philadelphia about 1792. I have the family well documented from that point forward.
I've already seen your posting on Ancestry for the family and appreciate that you included source documents and photographs.