Information found in Wm.Austin's book has.->
Abigail Bonnell b 2 Oct 1741/or 1754, d. 7 Apr 1839
m 1771 Isaiah Blackford.
Children [surname Blackford]
Mary Bonnell, Susanna, Isiaah Martin, Sarah
Abigail was the dau. of James and Sarah(?)Bonnell [both of them buried in NY]

This surname has been spelled many ways...sometimes more than one name in the same document.
Bonnel, Bonnell, Bunnel, Bunnell are just a few of the alternate spellings.