Glenda Thompson's book, Sylvester Thompson, Ohio Pioneer, and Descendants, 1979, lists Josiah as the son of James Thompson and Elizabeth Birley. He was one of a set of triplets (Jeremiah, Josiah, and Hezekiah) a sibling to nine other children (Maria, Sarah, Nancy, Elizabeth, Rebecca, David B., James-b. 1834-1839 OH).
His father was the second son of Sylvester and Mary (Seward) Thompson, Stokes, N.C.
Josiah is listed as born 9 June 1840 near Covington, OH Married 1 Jan., 1865 to Levina Heckman Died 19 Jan., 1912 Highland, KS Civil War (Co.A-103rd Ohio Inf.&Co. B-8th Ohio Cav.& Co. B 44th O.V.I.
2 Children" Clara (b. Oct. 1865 & mar. ? Heikes, lived in Highland, Mo.)) and James R (b. 13 Sept 1869, lived in Hiawatha, Md.)