Logan Fontenelle (May 6, 1825 – July 16, 1855), also known as Shon-ga-ska (White Horse), was a trader of Omaha and French ancestry, who served for years as an interpreter to the US Indian agent at the Bellevue Agency in Nebraska. He was especially important during the United States negotiations with Omaha leaders in 1853–1854 about ceding land to the United States prior to settlement on a reservation. His mother was a daughter of Big Elk, the principal chief, and his father was a respected French-American fur trader.