I have quite a bit on Oliver.I have a copy of a letter written in 1900.by his ggreatson Ebeneezer. He states that Oliver's father was a John Alexander.Other people have doubts inre to this.I thought untill recently that his father was an Ebeneezer Alexander, because of all the succeeding men with that name i.e. Ebeneezer C.This man also states that Oliver was born in Pennsylvania,andthat Oliver had a twin,James,and two half-brothers,Jeremiah and John,who in turn had two half-brothers,David and John Craig.I will look up the book and page no. indicating that Joseph and Abigail Alexander had ties to Oliver.What they were I dont know.One item I can't verify is that Adam Rankin Alexander was Olivers son. I will get back to you as soon as I can.JL Alexander.