The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
John Leach, of England, settled in Prince William Co., Va. His son William was married first to Fanny George, and they had Henry and Fanny. He was married the second time to Martha Clark, by whom he had William, Reason, Louisa, Martha, and Mary E. Henry married Frances Horton, and settled in Montgomery Co., Mo., in 1830. They had two sons and eight daughters. Fanny married John Robinson, who settled in Montgomery County in 1830. William died in infancy. Mary also died young. Reason, Laura, and Martha settled in Montgomery County.
Source: A History of the Pioneer Families of Missouri - Montgomery County