John Ralston Sr. of Slippery Rock Township, Butler County, PA died in Feb. 1850. His original will and probate file can be seen digitized at familysearch.org:
John Ralston Sr. had eleven children: William, James, Jane, John Jr., Elizabeth (Betsy), Mary Polly, Samuel, David, Susan, George and Elem.
John was born 17 MAY 1776 in Greensburg, Westmoreland County, PA and is buried on the Old Smith Farm in Slippery Rock. He was married to Betsey Sharp. He was an enlisted private in the War of 1812.
John Ralston Jr. married Nancy Agnes McLane and they settled in Jackson County, Iowa in 1853. Their son Millen Ralston is my great-great grandfather.