I knew I had seen this couple in the section on William and Biddy, and assumed there was an established connection. They are not my line of Pentecosts. Anyway after your post saying it was a dead end, I went back and looked and as you said, there is John H. with no parents. I'm sorry, I can't help. I've done absolutely no research on that bunch. Only on the Scarborough and Mary Weathers Pentecost line.