The following data is extracted from A History of the Pioneer Families of Missouri - Warren County.
Lawrence Long, of Culpepper Co., Va., settled in St. Louis Co., Mo., in 1797, and built a saw and grist mill. His children were Gabriel, John, William, James, Nicholas, Nancy, Sally, and Elizabeth. John married Rachel Zumwalt, by whom he had Lawrence and Andrew J. He died soon after, and in 1823 his widow and her two sons removed to Warren County, where she married Newton Howell. Lawrence married Malinda Hutchings, of St. Charles County. Andrew J. married Mary W. Preston of St. Charles County.
Source: A History of the Pioneer Families of Missouri - Warren County