Looking for Evans of Pennslyvania

I am searching for information regarding the EVANS family of Pittsburg and Washington, Washington County, Pennslyvania. My grandfather was Paul Hargraves Evans, born in Washington, Pa in 1896. His father was James W. Evans, born in Pa in 1857 and his mother was Matilda (Tillie) V. (Kim) Evans, bon in Pittsburg in 1858. Siblings of grandfather were Walter Lee, Louis K. and Edith B. James W. Evans and Louis were employed at Duncan and Miller Glass Company in Washington, Pa as a superintendant and VP. Looking for any information that takes me back beyond James W. and any associated information.