I do not believe there is a connection between these two Keller families. My Keller family was primarily found in Frederick County, Virginia from about 1780 until 1900. My earliest known ancestor is Jacob Keller who was married to Elizabeth Cyfret in Frederick County in 1801. My lineage continues with his son George Harrison Keller, then Joseph Clinton Keller, Austin Harvey Keller and my dad Elwood Frank Keller.As I continue my research, I'll keep a look out for your Keller. Thanks!