Ancestry Library Edition This link opens in a new windowAncestry Library Edition is a genealogy research tool created for libraries that provides patrons instant access to a wide range of unique primary resources for genealogical and historical research. With more than 1.5 billion names in over 4,000 databases, Ancestry Library Edition includes records from the United States Census; military records; court, land and probate records; vital and church records; directories; passenger lists and more.