The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
Jacob Lewellyn, son of Samuel Lewellyn, had a son Samuel who settled in Pike Co., Mo., at a very early date, and died in 1837. He left a son, John W., who married Jane Trabue, of Kentucky, in 1824, and had ten children, nine of whom are still living. Mr. Lewellyn lived for some time in Clarke Co., Mo., where he was Judge of the County Court for eight years. He settled in Montgomery County in 1839, having lived in St. Charles County in 1818, and in Pike County in 1820.
Source: A History of the Pioneer Families of Missouri - Montgomery County