In my research I have Jonathan May Jr, Co. E. Napier's Battalion TN Cavalry:
Born 1829, died 3 August 1864 as POW Rock Island, ILL, buried at Rock Island in lot #1167
Son of Jonathan May, Sr. and Catie Lewis
Married Sarah Fortner in 1850 (May is her 2nd husband)
Sarah: born 24 Feb 1835 Humphreys Co., TN, died 3 March 1912, buried at May Cemetery, Hurricane Creek, Humphreys Co., TN
Daughter of Levi Fortner and Nancy Keziah Curtis
Children: Nancy Jane L., Jonathan Henry, William Martin "Bill", and Samuel H.

Father, Jonathan May, Sr., was hung by guerrillas during the war for refusing to cooperate but his sons cut him down and he survived