Personally I'm not sure Polly was a born ELkins. However, she shows up in Wheelock notes, so I am assuming she's related to the line I'm researching.
The info you sent was interesting as far as Esther's last name. Is is possible the name was spelled Bohonon?
Would you have more info on the family?(i.e. the names of the spouses of the children?where did they live? who where Esther's parents? etc...)
The reason the name is familiar to me: Joel Judkins b. 1736-d. 1816 in Salisbury son of Sam & Sarah Bohonon (dau of Andrew & Tabitha Flanders Bohonon), was connected to this family and this may tie in some way.