Looking for Double Davises

My grandmother is Gay Lurena Davis born in Calhoun Co, WV on Feb 28th of 1907. She was married to Robert Hurshel Pepper (3-31-1902--5-30-1938) and later to Gilbert Miller (died 1974). Both of her parents are Davises.
Her father Joseph Sirus Davis- Born in WV (probably Wirt or Marion Co) on 1-19-1858 and died 12-5-1935 in Wirt Co, WV.
Her mother Phoebe Jane Davis- Born in Washington Co, OH on 1-24-1871 and died 10-21-1935 in Wirt Co, WV.
They were married in Wood Co, WV on 4-28-1887.
They are both buried in the Wolverton Cem. on Munday Road in Wirt Co.

Parents of Joseph Sirus Davis are:
Abraham R Davis bn abt 1822 in WV (maybe Marion Co)
Laverna Brumage bn abt 1834 in Marion Co, WV.

Parents of Phoebe Jane Davis are:
Isaiah H Davis bn Nov 1845 in Washington Co OH
Mary Ellen Harris bn Jul 1851 in OH
Married 2-17-1867 in Washington Co, OH.

Should anybody have additional info, please let me know.