He was probably named after John Calvin Mason (1802-1865), a popular Kentucky politician.

His death certificate (Vol. 22, #10952) lists John Mason Riddle, d. 30 June 1951, age 85, in Owingsville, Bath Co., residence same. Marital status widowed, date of birth 22 March 1866, occupation farmer, father Harrison Riddle, mother Littie Boyd, informant Ernest Riddle, cause of death coronary occlusion, burial Bailey Cemetery, Owingsville. Note that the given birthdate and age at death is 4 years younger than would be consistent with the 1870 census, where he is listed as age 8.

His stone in a well-kept cemetery at the top of White Oak Road in Bath Co. says:
Riddle : Alphoretta 1870-1931 John M. 1865-1951

I cannot find John in 1880. He is not listed with his parents, so was probably off working on someone else’s farm.

Her death certificate (vol. 18, #08627) states Alphoretta Riddle, died 1 Apr 1931 in Owingsville, Bath Co., Ky, age 61 years 10 days, born 22 March 1870 in Ky, married, wife of John Riddle, father James Goodpaster, mother Margaret Nailor, both born in Ky, cause of death arthritis deformant, informant John Riddle, burial in Bailey graveyard.

Bath Co. marriage records list John Riddle and Alphrety Goodpaster on 12 Mar 1887.

1900 census of Bath Co., Ky, Wyoming district, enumerated 13 June, records on p. 8B as family #159:
Riddle, John, 35, b. March 1865; Alpharetta, wife, 30, b. March 1870, married 13 years, mother of 6 children, 5 living; William W., son, 12, b. Dec 1887; Earnest, son, 10, b. Jan 1890; Mary May, dau, 8, b. March 1892; Effy Lou, dau, 5, b. Nov 1894; Burton T., son, 2/12, b. March 1900. All born Ky/KyKy.

The son listed here as William W. was later known as Walter William.

1910 census of Bath Co., Ky, Wyoming district, enumerated 22 Apr, lists on p. 5A as family #95/96:
Riddle, John, 45, farmer; Alphretta, wife, 40, married 23 years, mother of 8 children, 7 living; Earnest, son, 20; Mary M., dau, 18; Effie L., dau, 15; Burton T., son, 10; Christina R., dau, 5; Raymond A., son, 3. All born Ky/Ky/Ky.

1920 census of Bath Co., Ky, Wyoming precinct, enumerated 15 Jan, lists on p. 9B as family #198:
Riddle, John, 54; Rettie, 49; Effie, 22; Burton 19; Christine, 15; Raymond, 13; Walter, 2. All born in Ky. Walter is listed as a son, but according to the index to Kentucky birth records, he is really a son of Effie, and thus a grandson of John. (The index does not list fathers, so I don’t know who his father is.)

1930 census of Bath Co., Ky, Wyoming precinct, enumerated 8 April, lists on p. 3B as family #69:
Riddle, John, 66, age at first marriage 22, farmer; Retta, wife, 60, age at first marriage 17; Effie, dau, 34, single; Burton, son, 30, divorced; Raymond, son, 23, single. All born Ky Ky Ky.

Effie’s son Walter is listed as age 11, a lodger in the preceding household, headed by Asberry Fawley age 40 with wife Rose age 24.

1940 census of Bath Co., Ky, Wyoming precinct, ED 6-4, enumerated 8 April, lists on p. 4B as family #83:
Riddle, John, 75, farmer, married (but should be widowed); Effie, dau, 45, single; Walter Scott, son, 22. All born in Kentucky, living in same house in 1935.

Walter’s relationship should be listed as grandson.