Rebuck IN Juniata CO PA IN 1870s

I'm trying to find a REBUCK that had an illegitimate son with my ancestor Sarah Ann STEPP born 1853 Juniata Co, PA. She later married William Henry KAUWELL and they lived in Middleburg, Snyder Co, PA. Their son, George Albert STEPP/KAUWELL was born 22 Sept 1875 in Juniata Co, PA. Anyone who knows of a REBUCK family in Juniata Co during that time frame, please contact me. Thanks.