Son of Thomas Augustine Claiborne and Sarah Terrell Lewis. No doubt namesake of his mother's brother, the honorable but unfortunate Micajah Green Lewis.
Mr. Claiborne's mother died when he was 11 months old, and he was raised by his grandparents. Following his education, he entered the US Navy as an acting midshipman, after which followed an exciting naval career recounted in William Terrell Lewis' Genealogy of the Lewis Family in America, published in 1893. Lieut. Claiborne resigned his commission in 1849.
Micajah G L Claiborne married Lavinia Thompson Cannon, daughter of Newton Cannon and Rachel Sterns Welburn (/Welborn), on 19 Oct 1848, in Williamson County, Tennesee. After the death of her husband, Mrs. Cannon was enumerated in the 1860 household of her daughter and son-in-law, the Claibornes.