Then I am looking at the wrong generation. If Mary R. (Kerfoot) Butts had a daughter on 3 Feb 1880. So the head of the household for 1880 Berkeley Co. WVA, you would want man 50 years plus, to be the father of said Mary R. Kerfoot.
Kerfoot (?) James 50 Shoemaker PA IR PA "Catherine 47 wifePA PA PA "Rosa I18 Daughter WV PA PA "Mary W.14 Daughter WV PA PA "Richard 10sonWV PA PA "Anna8DaughterWV PA PA "Arrih6sonWV PA PA
KerfootJohn49SurveyorVA VAVA "Rachael 51 wifeVA Eng VA "Mary B.Daughter MOVA VA she listed as teacher "Joseph G. 16sonVAVA VA "Fannie Q.15 Daughter WV VA VA
KerfootJohn P.Jr.55 FarmerVA VA VA "Mary S.36 wifeVA VA VA "Wm.12sonWV VA VA
KerfootJohn P.75 Surveyor VA VA VA "Hester L.78wifeVA VA VA
My guess would be to view the 1870 Federal Census for Berkeley Co. WV. I do not believe my library here in VA has WV Federal Census.