Search me! It is the entry above your Joseph on IGI Newland. I saw that your Joe died at 6 years so it couldn't be him. The other one is just a possibility as I cannot see any other Josephs on the IGI. It would make him an "older" Dad, but as they all churned out children for years it wouldn't be that unlikely.

Don't worry, he'll turn up eventually!

Cheers
Chris