Are there two Johns here? We have exact dates for a marriage and the first two kids. Have we got any sources?
It's a bit unusual to know the date of a wedding but not the bride's maiden name - unless she's a widow.
If those dates are correct, there should be a married John in the Muster, Jan/Feb 1624/5, but there isn't - unless those events happened in England.
Martha McCartney's book has two Johns in the Muster, neither married, but one died in 1629.
For the other one (Southampton passenger), she links him with the "ancient inhabitant" because the age matches, and she links him with a 50-acre patent. But that's all she's got. She doesn't mention the wife or kids in the will or the land deals mentioned by Boddie, so she probably thinks that's a different John.
She cites Dorman, what does Dorman say? Apparently he does mention the will?
Looking at the Change Logs, "son" William is already a merge of at least two different Williams. The will doesn't mention a William, of course he could have been dead by then, if they had one, but what says they had one? Is there a source for any kids, apart from the will?