| | Database Title | Category | | Names |
|---|
 | Y Cwtta Cyfarwydd, 1597 - 1653 | Social, Regional and General History | | 9,620 |
 | Yale Genealogy and History of Wales | Social, Regional and General History | | 20,916 |
 | Yards Creek Folks | Social, Regional and General History | | 2,042 |
 | Yarmouth Genealogies: Hemeon Family | Social, Regional and General History | | 668 |
 | Yarmouth Past and Present: A Book of Reminiscences | Social, Regional and General History | | 49,734 |
 | Yarmouth, Nova Scotia Genealogies | Birth, Marriage and Death Records | | 97,536 |
 | Yarmouth, Nova Scotia: A Sequel to Campbell's History | Social, Regional and General History | | 36,050 |
 | Yawkey, Richardson and Allied Families: A Genealogical Study with Biographical Notes | Social, Regional and General History | | 16,163 |
 | Ye Ancient Greene Tree: Dedecated [sic] to Mrs. Lora S. LaMance | Social, Regional and General History | | 1,515 |
 | Ye Atte Wode Annals | Social, Regional and General History | | 8,591 |
 | Ye Fayerbanke Historical: Devoted to the Interest of the Fairbanks Family in America, Volume 1, Nos 1 and 2 | Social, Regional and General History | | 8,272 |
 | Ye Horseforde Booke: Horsford-Hosford Families in the United States of America | Social, Regional and General History | | 24,241 |
 | Ye Kingdome of Accawmacke or the Eastern Shore of Virginia in the 17th Century | Social, Regional and General History | | 7,629 |
 | Ye Olde Meeting House: Addresses and Verses Relating to the Meeting House, Burlington, Middlesex County, Massachusetts, Built 1732 | Miscellaneous Records and Reference | | 3,887 |
 | Year Book of the Holland Society of New York, 1914, Volume 2 | Miscellaneous Records and Reference | | 3,595 |
 | Year Book of the Holland Society of New York, 1915, Volume 3 | Miscellaneous Records and Reference | | 3,286 |
 | Year Book of the Illinois Society of the Sons of the American Revolution | Directories and Lists | | 13,618 |
 | Year Book of Trinity Church, East Orange, New Jersey, June, 1907 | Miscellaneous Records and Reference | | 936 |
 | Yearbook of the Holland Society of New York, 1913 | Other Topics | | |
 | Years of Experience: An Autobiographical Narrative (Georgiana Bruce Kirby) | Birth, Marriage and Death Records | | 1,077 |
 | Years of My Youth (W. D. Howells) | Miscellaneous Records and Reference | | 970 |
 | Yesterday in Hall County, Texas | Miscellaneous Records and Reference | | 16,046 |
 | Yesterdays on Brooklyn Heights | Miscellaneous Records and Reference | | 18,071 |
 | Yewens Directory Landholders New South Wales 1900 | Directories and Lists | | 36,000 |
 | York 1822 Hist, Dir & Gazetteer, Volume 1, West Riding | Directories and Lists | | 96,960 |
 | Yorkshire to Westchester: A Chronicle of the Wood Family | Social, Regional and General History | | 24,734 |
 | Youngs Family: Vicar Christopher Yonges His Ancestors in England and His Descendants in America | Social, Regional and General History | | 24,508 |
 | Yukon Daily Morning Sun (Dawson, , Canada) | Newspapers and Periodicals | | 351,896 |
 | Yukon World (Dawson, Yukon, Canada) | Newspapers and Periodicals | | 46,762 |