The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
James Glenn and his wife, Sarah Grigg, with their two children, James and Nellie, came from Ireland to America, and settled in Virginia. After their settlement there the following children were born Polly, William, Thomas, and Whitehill. Mr. Glenn and his three sons, William, Thomas, and Whitehill, moved to Ohio; the rest of the children married and settled in Kentucky. James, William, and Thomas were in the war of 1812, and the former was killed at the battle of New Orleans. The other two were with the armies that operated in Canada and the northern part of the United States. After the war Thomas married Lucinda T. Kendall, of Kentucky, and came to Missouri in 1815. He came in a wagon, which contained, in addition to his family and furniture, a set of wheel-wright's tools, a gun and a dog. Mr. Glenn settled first on Cuivre River, but made about twenty settlements in all before he could find a location to suit him. These were all within the present limits of Montgomery County. He was a great hunter, and during the first year of his residence in Missouri killed fifty-six deer, one elk, and one bear. The names of his children were Julia A , Emily H., Sarah E., James M., and William I.
Source: A History of the Pioneer Families of Missouri - Montgomery County