The David K. Treadwell Genealogical Collection (1955-1973) documents the genealogy of the Treadwell family. The collection includes requests for information from the Genealogical Society of the Church Of Jesus Christ Of Latter-Day Saints, Inc. Treadwell traced his family history to the 15th century. Notable materials in the collection include a family tree album with a family crest document, and catalogs from the Genealogical Book Company. Treadwell died on March 1, 1992, in San José, CA.