Assignment as a son of Thomas Jones and Mary Katherine Smith is because his daughter Stella was recorded in the 1930 census with Harvey Johnson and Alice Jones, her relationship recorded as niece-in-law, that is, a niece of Alice’s.

His WW I draft registration card, filed 12 Sep 1918 in Bath Co., Ky, records Lewis Jones, age 32, residence Rt. 1, Moorefield, Nicholas Co., Ky, farmer, employer Jim Ledford, Bath Co., Ky, nearest relative Lee Jones, Rt. #1, Moorefield, Nicholas Co., Ky.

1900 census of Fleming Co., Ky, district 4, enumerated 14 June, lists on p. 12A as family #206/213:
Smith, Matthew W., 44, b. Nov 1855, farmer, single; Eliza B., sister, 47, b. Apr 1853, widowed. Jones, Lewis, boarder, 12, birthdate blank. Applegate, William, boarder, 24, b. May 1876, single, farm laborer. All born Ky Ky Ky.

Matthew and Eliza are children of James E. Smith and Angeline Thompson. The preceding household is headed by their brother William R. Smith, and includes a “Tim Jones” who is probably really Jim, that is, Lewis’s brother James M. Jones.

1920 census of Fleming Co., Ky, Sherburne precinct, enumerated 28 Jan, lists on p. 5B as family #113:
Jones, Lewis, 33, farmer; Lee, wife, 22; Howard, son, 5; Stella B., dau, 2 1/12. All born Ky Ky Ky.