Have you looked at the COLLIER forum? There is a lot of info on various John Colliers there, of VA and SC.
Apparently several Colliers moved from VA to SC in the1790's or so. Related families were Turner, Waler, Wyatt, and Eppes, among others.
I am seeking info on a Miss Collier / Colyer, b VA abt 1754, m Abednigo "Ab" Turner. (aka Abednego). They moved to Abbeville, SC. She died, and he m Phebe Waller. Abe died, and Phebe m Edward Collier / Colyer.