| Biography & Genealogy Master Index (BGMI) | 6,618,597 |
| American Genealogical-Biographical Index (AGBI) | 4,665,619 |
| Jewish Given Name Variations | 721,272 |
| U.S., Encyclopedia of American Quaker Genealogy, Vol I–VI, 1607-1943 | 356,712 |
| Minnesota County History Name Index | 216,812 |
| New York, U.S., Death Newspaper Extracts, 1801-1890 (Barber Collection) | 164,088 |
| Pennsylvania, Published Archives Series, 1664–1902 | 101,988 |
| Oklahoma, Historical Indian Archives Index, 1856-1933 | 80,327 |
| Webster's Dictionary of the English Language, 1806 | 38,029 |
| U.S. Gazetteer, 1854 | 33,355 |
| Encyclopedia of American Biography, 1800-1902 | 30,399 |
| U.S., Cemetery Address Book, 1994 | 28,812 |
| Salina, New York, U.S., Records, 1805-1969 | 21,673 |
| Tennessee Records | 15,086 |
| Missouri, U.S., Cemetery Inscription Sources, 1995 | 15,040 |
| U.S., Select Family History and Bible Records Index | 14,871 |
| The papers of Sir William Johnson | 13,916 |
| U.S., Professional Baseball Player Profiles, 1876-2004 | 13,622 |
| U.S. and World Atlases, 1822-1923 | 8,170 |
| Ancestry's Concise Genealogical Dictionary | 4,799 |
| Missouri History Encyclopedia, 1901 | 4,060 |
| Who's Who on the Pacific Coast, 1913 | 3,701 |
| California, U.S., Cemetery Inscription Sources, 1994 | 3,169 |
| U.S., County History Catalog | 3,136 |
| Encyclopedia of the history of St. Louis : a compendium of history and biography for ready reference | 2,901 |
| Iowa Progressive Men | 2,900 |
| U.S., Map Collection, 1513-1990 | 2,804 |
| A history of Tennessee and Tennesseans : the leaders and representative men in commerce, industry and modern activities | 2,786 |
| US & British Isle, Joseph Thomas Biographical Dictionary, 1890 | 2,527 |
| Index to the colonial and state records of North Carolina covering volumes i-xxv | 2,238 |
| Historical collections of Ohio | 2,051 |
| The Historic annals of southwestern New York | 2,033 |
| NARA Collections on Ancestry.com | 2,026 |
| Historical miscellany | 2,005 |
| Kansas, U.S., Post Offices, 1880 | 1,432 |
| A bibliography of the state of Maine | 1,416 |
| Iowa Gazetteer and Business Directory, 1884-1885 | 1,381 |
| Encyclopedia of Philadelphia | 1,344 |
| A contribution to the history, biography and genealogy of the families named Sole, Solly, Soule, Sowle, Soulis | 1,330 |
| Index to the Transactions of the Ill. State Historical Society and other publications of the Ills. State Historical Library | 1,323 |
| Historical encyclopedia of Illinois and History of McDonough County | 1,282 |
| Historical encyclopedia of Illinois and History of Du Page County | 1,275 |
| Historical encyclopedia of Illinois and History of St Clair County | 1,272 |
| Missouri State Gazetteer and Business Directory, 1881 | 1,261 |
| Dictionary of Biography and Mythology, Volume I | 1,244 |
| The Scotch-Irish, or, The Scot in North Britain, North Ireland, and North America | 1,239 |
| Historical encyclopedia of Illinois and History of Kendall County | 1,238 |
| Oregon, Washington and Alaska gazetteer and business directory : 1901-1902. | 1,208 |
| Historical encyclopedia of Illinois and Knox County | 1,159 |
| Commemorative biographical encyclopedia of Dauphin County, Pennsylvania | 1,154 |
| Historical encyclopedia of Illinois and History of Champaign County | 1,145 |
| Historical encyclopedia of Illinois and History of Morgan County | 1,138 |
| Historical encyclopedia of Illinois and History of Tazewell County | 1,118 |
| Missouri Biographical Dictionary | 1,103 |
| Historical encyclopedia of Illinois and History of Carroll County | 1,096 |
| Historical encyclopedia of Illinois and History of Schuyler County | 1,095 |
| Alphabetical general index to public library sets of 85,271 names of Michigan soldiers and sailors individual records | 1,081 |
| Historical encyclopedia of Illinois and History of Warren County | 1,081 |
| Illinois Historical, Effingham County Biographical | 1,050 |
| Who's who in New York City and State: a biographical dictionary of contemporaries. | 1,035 |
| Historical encyclopedia of Illinois, Cook County Edition | 1,030 |
| Landmarks of Orleans County, New York | 1,023 |
| Historical encyclopedia of Illinois and History of Boone County | 1,018 |
| Nelson's biographical dictionary and historical reference book of Erie County, Pennsylvania | 1,013 |
| Doane Robinson's encyclopedia of South Dakota | 1,003 |
| Peoria County, Illinois Biographical Dictionary | 998 |
| English Origins of New England Families, Second Series Vol. III | 997 |
| Historical encyclopedia of Illinois and History of Clark County | 997 |
| The United States biographical dictionary and portrait gallery of eminent and self-made men. | 996 |
| L'Hommedieu : index. | 970 |
| R.L. Polk & Co.'s 1915-16 Alaska-Yukon Gazetteer and Business Directory | 948 |
| Kansas Biographical Dictionary, 1879 | 947 |
| Architectural resources survey of the city of New Brunswick, New Jersey | 942 |
| Historical gazetteer of Steuben County, New York : with memoirs and illustrations | 940 |
| Notable men of Alabama : personal and genealogical, with portraits | 939 |
| Matthews' American Armoury and Blue Book | 931 |
| Handy Book of American Authors, 1907 | 930 |
| Guide to vital statistics records in New Jersey | 919 |
| Settlers of Maryland, 1679-1783. Consolidated Edition | 903 |
| Historical encyclopedia of Illinois and History of Lee County | 896 |
| English Origins of New England Families, Vol. III | 883 |
| The county archives of the state of Illinois | 870 |
| DeKalb County, Illinois Biographical Dictionary | 861 |
| Historical encyclopedia of Illinois and History of Mercer County | 860 |
| Biographical and portrait cyclopedia of Chester County, Pennsylvania : comprising a historical sketch of the county | 857 |
| English Origins of New England Families, Vol. II | 845 |
| Mayflower Source Records | 844 |
| The Descendants of Louis XIII | 829 |
| Virginia, Colonial Abstracts, 1632-1810 | 813 |
| Minutes of the Common Council of the city of Philadelphia, 1704 to 1776 | 807 |
| Gould's blue book for the city of St. Louis, 1913 | 807 |
| Maryland Genealogical and Memorial Encyclopedia | 802 |
| The Compendium of American Genealogy, Vol. VII | 795 |
| Historical encyclopedia of Illinois and History of Fulton County | 780 |
| Suffolk surnames | 778 |
| Historical gazetteer of Tioga County, New York, 1785-1888 | 760 |
| Encyclopedia of genealogy and biography of Lake County, Indiana | 758 |
| Shelby and Audubon Counties, Iowa Biographical Dictionary | 757 |
| Gazetteer and business directory of Windham County, Vt., 1724-1884 | 749 |
| The Compendium of American Genealogy, Vol. VI | 748 |