The Jonathan SELL who married a WYETH is an ancestor of mine.Jonathan married Hannah WYETH -- I am still tracking down the particulars, but probably in Glouster Co, NJ.According to an online GEDCOM, Hannah is sister to Sarah WYETH, who married a Thomas Dennis in 1720 in Chester, PA.
Again, assuming this source is correct, both are daughters of John WYETH and Joan (unknown) of Chester Co, PA.Notes include:
"Administration of 4 Jan. 1725 in Chester Co., Penn. for John Wyeth/Wyth of Birmingham twp.; names wife Joan; bondsman = John Wyeth Jr., Thomas Dennis, and Jonathan Sell (spelled Syll in this document)!"