His death certificate records William Cox, age 82 years 10 months 25 days, born 6 May 1845 in Kentucky, died 1 April 1928 in Little Poplar Creek, Knox Co., Ky, married, father Gale Cox, born in Ky, mother’s maiden name Lithie Goins, born in Knox Co., Ky, cause of death flue enza, informant J. M. Carpenter, Ruin, Ky, burial in Lewis Cemetery.

The reported age and birth date are probably off by at least three years. He was recorded in the 1860 census as age 12 (but was not with his parents in the 1850 census), in the 1870 census as age 18, in the 1880 census as age 27, and in the 1900 census as age 52 born April 1848.