William & Rachel Walters, PA

I am looking for info on a William Walters that married a Polly Bonstein/Bunstine/Bundtstein etc early 1800's in PA I have no other info on them. I am looking for info on a Rachel Walters that married Aaron Bunstine etc, he was born in 1809 Easton, PA info I have says she was the daughter of Michael and Elizabeth Walters. Rachel and Aaron had:
1. Mary Bunstine b. Nov 1827 Easton, PA d. 2 Jan 1879 Easton, pAhad a child William Osterstock, then she married Francis Vogel 5 dec 1859.
2. Michael Bunstine b. 1836 d. Jan 1905 Easton, PA married Mary Frankenfield
3. Andrew Bunstine b. 1838 d. Jan 1866 Easton, PA
I believe Rachel and William Walters might have been brother and sister, or cousins,would appreciate any info.
Thanks
TanyaBiblgirl@msn.com