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Douglas Charles Richardson (living 2018) is an American genealogist, historian, lecturer, and author based in Salt Lake City in Utah, the location of the Mormon Church's vast genealogical library, the International Genealogical Index. He is experienced in researching cases involving all periods of American research from colonial to the modern times. He also specializes in the genealogy of medieval English gentry families and English royalty.
Richardson was Contributing Editor of The American Genealogist and was formerly a member of the Santa Barbara Genealogical Society and of the Connecticut Society of Genealogists. As a schoolteacher of American History he held positions at El Reno Junior College, in El Reno, Oklahoma, and at Hillsdale Free Will Baptist College, in Oklahoma City, Oklahoma.
Richardson is best known for his books:
- Plantagenet Ancestry: A Study in Colonial and Medieval Families, Kimball G. Everingham (ed.), Genealogical Publishing, Baltimore, Maryland, 2004. The book seeks to identify all the early American colonists whose ancestry can be traced back to the English monarchs.
- Magna Carta Ancestry: A Study in Colonial and Medieval Families, Expanded 2011 Edition, Vols. 1, 2, 3 & 4, 2011.
- Royal Ancestry: A Study in Colonial & Medieval Families, Vols. 1, 2, 3, 4, & 5, 2013. Lists descents from the early Kings of England, France, and Scotland for over 250 persons who emigrated from the British Isles to the North American colonies in the 17th century.
He has contributed to various publications including:
- The New England Historical and Genealogical Register (NEHGR), *The American Genealogist (TAG),
- New York Genealogical and Biographical Record (NYGBR), *Heritage Quest Magazine, and Foundations.
- Biography in Who's Who in Genealogy and Heraldry (2nd ed.)
- "About Douglas Richardson". Royal Ancestry Publications. Retrieved 28 February 2019.