Josiah Sirmans, son of Edward Sirman(s), was born in 1767 in Pitt, NC. 
Josiah married 1790 in Effingham, GA to Harty Hardeman, daughter of Thomas Hardeman  & Elizabeth __?__. 
Josiah's family moved to Georgia in the 1780s  where he would marry Harty Hardeman.
Josiah Sirmans lived in Screven County until Bulloch was created in 1796 when he was cut off into it. In 1812 his residence was again changed by the creation of Emanuel out of Bulloch. About 1819 he moved to the new County of Appling. In 1822 he with his family including his married sons, and William, John and Moses Tomlinson, all moved from Appling County to what later became (in 1850) Clinch County and became the first settlers in the original territory of Clinch County. At the time (1822) it was Irwin County; but in 1825 was changed to Lowndes; in 1850, into Clinch, and in 1920 into Lanier County.
Mr. Sirmans entered into the organization of Union Baptist Church on the west bank of the Alapaha River, Oct. 1st, 1825. He came in as an ordained deacon, by letter from Hebron Church, Emanuel County, and thus became the church's first deacon. On Nov. 12, 1825, Mrs. Sirmans came into Union Church by letter from the same Hebron Church. He died a member Jan. 6 1830. She died a member also, about 1848. Both are buried in the ender Cemetery on the east side of the Alapaha River. His grave is marked but Mrs. Sirmans' grave is unmarked.
Bulloch County records show Josiah Sirmans and John Jones (a brother-in-law) applied for administration on the estate of Edward Sirmans (or Sirmon) Sept. 9, 1805. No other mention of the estate appears on the records there. 
Find A Grave, database and images FindaGrave, memorial page for Josiah Sirmans (1767–6 Jan 1830), Find A Grave: Memorial #31348928, citing Fender Cemetery, Lakeland, Lanier County, Georgia, USA ; Maintained by Hether Pearson Pillman Belusky (contributor 47055925) .
It may be possible to confirm family relationships with Josiah by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Josiah: