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                   J. R. Kelso, p. 575
J. R. KELSO, a well known citizen and enterprising agriculturist of Mt. Pleasant township, is a son of George M. Kelso, whose father was Mark Kelso.
The Kelso family are of Irish descent, and Mark Kelso, after his marriage to Elizabeth Ewing, came to a farm in Allegheny county, Penn., where he remained for some time, and in 1818 bought an improved farm, which became his permanent home. His wife died many years before him, leaving the following children: Mary (Mrs. John Cowden), living in Mt. Pleasant township; Jane, married to George Robb; Esther, deceased in 1888; Elizabeth, deceased in 1884; George M., the father of our subject; John, married in Ohio, had one child, Americus, who died some years ago; James, Martha and Letta Ann (mentioned below). Of these children, James Kelso was first married to a Miss Elder, who bore him children as follows: William E., Mark, John, Elizabeth and Lucinda; the mother died, and for his second wife James was married to Jane Miller, and they had three children: Margaret, Alice and Miller; this wife also died, and Mr. Kelso then made a third choice in the person of Mrs. Catherine McMillan, who bore him two children, viz., James and Samuel George. The father of this family died in Allegheny county, two years after the decease of his last wife. Martha Kelso became the wife of Phineas Kelso, of Lawrence county, Ohio, and four children were born to them, as follows: Mark (who entered the service in Lawrence county, and was killed in battle), Elizabeth, Andrew and John. Letta Ann was married to John Gregg, of North Fayette township, Allegheny Co., Penn., the following children being born to their union: Elizabeth, Mark, Edward, Mary, Levi and Esther (twins), Clara, Emma and Ellsworth.
Text taken from:  Beers, J. H. and Co., Commemorative Biographical Record of Washington County, Pennsylvania (Chicago: J. H. Beers & Co., 1893).