His death certificate records Sim Thornsberry, age 75, born 10 August (year blank) in Letcher Co., died 29 Aug 1935 in Rowan Co., Ky, married, husband of Mandy Kidd, farmer, father Anex Thornsberry, mother’s maiden name Mahala Thornsberry, both born in Letcher Co., cause of death paralitic stroke, informant Sarah Jenning, Hamm, Ky, burial in Fannin Cemetery.

1880 census of Rowan Co., Ky, Christy Creek precinct, enumerated 1 June, lists on p. 52 as family #366/393:
Thornsbery, Simpson, 21, farmer; Amandy, 18, wife; Mary B., 1, dau. All born Ky Ky Ky.

I cannot find this family in 1900.

1910 census of Rowan Co., Ky, Hogtown precinct, enumerated 3 May, lists on p. 13B as family #217/218:
Thornsberry, Sim, 48, farmer; Mandy, wife, 49, married 34 years, mother of 12 children, 11 living; James, son, 24; Pete, son, 22; Ed, son, 20; Henry, son, 18; Harvy, son, 16; Allie, son, 14; Lula, dau, 12; Marion, son, 2. All born Ky Ky Ky.

1920 census of Rowan Co., Ky, Wagner precinct, enumerated 9 Jan, lists on pp. 4A-$B as family #60/63:
Thornsberry, Sims, 55, farmer; Manda, wife, 40; Marion, son, 12. All born Ky Ky Ky.

1930 census of Rowan Co., Ky, Wagner precinct, enumerated 3 April, lists on p. 2A as family #26:
Thornberry, Sim, 67, age at first marriage 18, farmer; Amanda, wife, 67, age at first marriage 18; Wile (? hard to read), son, 45, single, logger. All born Ky Ky Ky.