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Kentucky Genealogy and Biography Volume IV– Battle – Perrin – Kniffin, 3rd ed., 1886.
DR. JOHN S. LAIN was born October 15, 1834, in Wilson County, Tenn., where he was reared until 1848; then he removed with his parents to Sumner County. In August, 1861, he entered the Thirtieth Tennessee Confederate Regiment of Infantry as lieutenant, and remained in the army until 1863. His father, Thornton Lain, a native of east Tennessee, was born in 1800; was a planter, and died in 1855. He was the son of John Lain, a native of North Carolina, who died about 1843, at a great age. He was of Irish descent. Thornton Lain espoused in marriage Fannie, daughter of Lee and Mary (Standfield) Harralson, of Wilson County (born 1810, died 1860), and from their union sprang Amanda (Thornton), Mary A. (Thornton), Chany (Sherron), Ephraim, Susan (Reddick), Dr. John S., Lee T., Nannie J. (Pond), William H. and Fanny (Rippy). In youth, Dr. Lain attended the common schools in the vicinity where he was reared, and at the age of eighteen years and undertook the task of procuring an education, and by his own labor secured the means of attending the Mount Vernon school for eighteen months, when he engaged in teaching for ten months; then attended for six months at Mount Vernon, and procured a good English education. In 1859 he commenced the study of medicine with his uncle, Dr. A. G. Lain, of Gibson County, Tenn.; with whom he remained eighteen months, and in 1860-61 he attended lectures at the medical department of the University of Nashville, and the same year he was promoted to the office of assistant surgeon in the army, which position he retained while he remained in the service. In 1864 he commenced practicing medicine at New Roe, Allen Co., Ky., where he remained until 1865, when he located at Palmyra, in Simpson County, in which vicinity he has since been successfully engaged in the practice of his profession. He first married, February 2, 18656, Mary A., daughter of Dr. E. D. and Bettie (Hobdy) Fronville, of Simpson County, born May 24, 1849; died March 30, 1876, and their union was favored by the birh of Fannie B. (Hunt) and Edgar H. On the 24th day of May, 1878, he married Burnet, daughter of Samuel and Rebecca (Smith) Hatfield, of Simpson County, born November 14, 1849, and to them has been born one daughter, Myrtle. In 1881Dr. Lain was elected representative of Simpson County to the Legislature of the State. He is now living on his farm of 226 acres of productive land in a good state of cultivation. He is a Roy Arch member of the Masonic fraternity, and in politics is a Democrat.