Kiln, called "the Kiln" by locals with the "n" silent, is named for the kilns that once dotted the area. Choctaw and Muscogee people hunted and fished along the river here before French settlers, many from Canada, arrived as hunters and trappers. The first known white settlers were Jean Baptiste Nicaize (Necaise) and his family, who likely held a Spanish land grant here by about 1800. The river was named for Noel Jourdan, an early settler who later served as a delegate to Mississippi's 1817 constitutional convention and as Hancock County's first state legislator, and the settlement was long known as the Jourdan Community.
More about Kiln
Tar kilns producing naval stores had worked the area since British colonial days, shipping tar by schooner to New Orleans to caulk ships, and in the 1840s the community did a thriving business in charcoal. By the 1880s some residents were calling the place Kiln, and by 1913 the name was established. The sawmill era began around the Civil War, when Samuel L. Favre of Mobile built a mill on the Jourdan River and, in 1859, a house now considered the oldest in the Kiln. Shipyards and shingle mills followed. On December 7, 1908, the W. W. Carre Company of New Orleans bought the Herlihy and Haas mill and built a logging railroad north through the county; after the mill burned in 1912, the Edward Hines Lumber Company of Chicago bought the property in January 1913 and reorganized it as the Jourdan River Lumber Company, opening a new mill in 1914 that could cut 150,000 feet of lumber a day.
Sources
Wikipedia: Kiln, Mississippi