The Kerdeman's of Lancaster County, PA

I am working of my husbands family, Julius Kerdeman and Lillian May Rhinehart.They lived in New York and later moved back to Pennsylvania [Harrisburg ,Hershey area]On my family I Have lots of families I'm working on.Most of them are from Lancaster County, PA, but we have afew from Lebanon County and some from Dauphin County. The Surnames are: Kupp/Kopp, Ruhl,Wenger,Acker, Williams,Witman, Cox,Poorman,Warner,Hester, Brenneman, Phenegar and afew others.
On my fathers family my greatgrandfather was Nathan Kupp. He married Lizzie Ruhl. They Lived in Lancaster County, Pa. Nathans parents were Benjamin Kopp and Caroline Lichty. I am looking for Benjamin and Caroline's families.Lizzie's parents were Joseph Ruhl and Barbara Miller.
On my mothers family I'm looking for the Poorman Family. My greatgrandfather was Samuel J. Tillman Poorman and he married Barbara Brenneman Warner. Samuels parents were Henry Poorman and Amelia Neiman. I would like more information on this family. Also I'm looking for more on George Warner and Edna Hester. I have some things but could use more to fill in some information.