I've hit somewhat of a wall with tracing past my great grandfather. I'll list what I have so far and if anyone has anything else to add it would be most appreciated.

Walter Charles Tennis b. 3/25/1905 Dauphin County, PA d. 12/2/1968 m. 8/15/1933 to Nora Virginia (Plank)

Father of Walter: Samuel Tennis b. and d. unknown
Mother of Walter: Stella Brown

It is unknown as to whether Samuel and Stella ever got married as there is an uncertainty on this point.