I didn't find the Bohanan name on the 1860 US Census or Slave Schedules for either the Choctaw or Chicksaw Nations.
W. L. COCHRAN
History of Indian Territory
Surnames: RAY, BOHANAN (Choctaw), COCHRAN, REDMOND
W. L. Cochran is identified with both commercial and agricultural interests, being the proprietor of a general mercantile establishment in Stonewall, while at the same time he follows farming and stock-raising. He was born in Tennessee on the 11th of January, 1844, but was reared and educated in Mississippi. In 1861 he came to the Indian Territory, raised a cavalry company and joined the Confederate army. For about eighteen months he was commissary. After the war he became interested in farming and stock-raising, following those pursuits until 1868, whe he embarked in merchandising at Pontotoc. After a year or two the post office was removed to what is now Stonewall, where he has since engaged in business, conducting a well-appointed general mercantile establishment. He carries a line of goods suited to both the country and town trade and his reliable business methods have secured to him a liberal patronage. He also has landed interests and is engaged in farming and stock-raising, which bring to him a good financial return.
Mr Cochran was married, in 1865, to Miss Jincy BOHANAN, of Choctaw blood, and unto them has been born a daughter, Eugene, now the wife of Dr. James Ray, of Denison, Texas. For his second wife Mr. Cochran chose Ella REDMOND, a white woman, and they have a daughter, Ella F., who is now a student at Denison, Texas.
Source: Gideon, D.C. "History of Indian Territory" Descriptive, Biographical and Genealogical, with a General History of the Territory. New York: Lewis Publishing Co., 1901.
Transcribed by Joni L. Valley Stockinger, April 17, 2007.