The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
The father of William Kerr, whose name was Thomas, died when he was six years of age. They were originally of Virginia, but at the time of Mr. Kerr's death they were living in Mercer County, Ky. William was bound out by his mother, who did not feel able to raise him; and in 1827 he came to Montgomery County. Here he married and had James H. H., George W., Elizabeth, William A., John T., Melissa C., Benjamin, Sophia, William, Douglass M., and Milton. Two of the children are dead, and all the others, except one, who resides in Lincoln County, live in Montgomery County. William Kerr was a stage driver for sixteen years, on different routes, but most of the time on the route between Fulton and St. Charles, over the Booneslick road. He was one of the best drivers that could be found, and his services were sought by all the contractors. The horses were herded on the prairies, like cattle, when they were not in use.
Source: A History of the Pioneer Families of Missouri - Montgomery County