http://www.pagenweb.org/~columbia/bios4.htm

Ira JOHNSON, farmer, P.O. Millville, is descended from the JOHNSONs who were among the early settlers of Columbia County. John Jacob JOHNSON, his grandfather, was a native of Germany; was enrolled in the service of the British and brought to America to fight the colonists. Deeming their cause a just one, he watched his opportunity, joined the American forces and served as a cavalryman until the close of the war. He was wounded during his service in the cheek and leg and subsequently received a pension. Soon after the close of the Revolution he came to what is now Columbia County, and lived for several years at Orangeville. He was by trade a tailor, and married Mary BARNHART, who bore him six children: Barney, Jacob, William, Catherine (who married George KLINE), Elizabeth (married Harmon KLINE), and Sarah (who became the wife of George SNYDER). William, the father of Ira, was born February 7, 1788, in New Jersey, and died January 24, 1877. He married Jerusha, a daughter of Robert and Elizabeth (ROBBINS) RICHART. William was a tailor, and to him and wife were born six children: Wesley R., Sarah (wife of Demar JOHNSON), Minerva (wife of William McMICHAEL); Philena L. (wife of Jackson ROBBINS), Arsintha (wife of James MANNING) and Ira. The last named was born May 21, 1822, one mile east of Millville, and when young worked with his father at the tailoring business, but later gave his attention to farming. He married Sarah, daughter of Michael and Catherine (SNYDER) THOMAS, and two sons blessed their union: Charles BRITTON and Arthur WILSON. (History of Columbia and Montour Counties Pennsylvania, Battle, 1887, pg 474)