The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
John McGinnis and his wife came from Ireland, and settled first in Virginia, from whence they removed to Kentucky. Their son, Greenberry D., married Sallie Lewis, of Kentucky, and settled in Lincoln Co., Mo., in 1832. His children were Elizabeth, Margaret B., William B., Jane, Nancy, Thomas S., Maria, Milton, Sarah E., and Mary E. Milton married Margaret Williams, and settled in Pike County. Elizabeth married Enoch Sevier, and lives in Lincoln County. William B. married twice and settled in Illinois. Jane and Nancy died single. Sarah E. married John Harris, and settled in Illinois. Samuel, son of John McGinnis, Sr., was married twice, and by his first wife he had John, Dora, Samuel, Jr., Polly, and Elizabeth. He was married the second time to Mrs. Mary McGinnis, by whom he had, Erasmus T., William, and Jesse G. Erasmus was married first to Miss Stewart, and second to Fanny Berger. He lives in Montgomery County. William also married a Miss Stewart, and lived and died in Montgomery County.
Source: A History of the Pioneer Families of Missouri - Montgomery County