Dunnagan ancestry is traced to Andrew Jackson Dunnagan (1813-1892) who was born in Dickson County, Tennessee, son of James Dunnagan and Sabillah Honer (Horner). He married Margaret Ann Austin (1837- 1929) and later died in Sulphur Rock, Arkansas. One descendant, Mary Jane Matilda Dunnagan, married Zedoc Freeman Richard DeVaughan (1854-1901) in 1880. Includes Bible records of families of various descendants, including Frances Marion Engles, William McMillan (1870-1938), Zorah Z. Gray (1870-1942), James Jarrett McClesky and other related families. Also includes Bible records of family of Ezekiel Dunagan (1771-1847) of Georgia. Family members primarily lived in Tennessee, Arkansas, Texas, and Oklahoma.

Previously published by Magna Carta, Baltimore. Published as a set by Genealogical Publishing with the two vols. of the Genealogies in the Library of Congress, and the two vols. of the Supplement. Set ISBN is 0806316691.