Hi Annie,
Thanks for the comments.
I only have one child for them, John died in November 1721, their son William was born in June 1722 and Jane remarried in early 1723. I also have a feeling that who I have thought was John (b1698) and his father John (c,1670) may in fact have been the same person, which could make Jane his second marriage.
The spelling of the name Simpkins, Simkins, Simpkin, Simkin, is somewhat interchangeable across the various records I have.
Given that priests did most of the writing, and probably wrote what they heard, that is unsurprising.
I have checked some alternate sounding names, but nothing from the same area at that time has come up.
Andrew