| Jaccard-Wolfgram and Families: Family history as compiled by Cheryl Jaccard Cowart. Includes database, gallery, notices, reunions, guestbook and associated links. |
| Jacomb: Encompasses all permutations of the name including Jacomb, Jacombs, Jacombe, Jacom and Jacomb-Hood. |
| Jacques: My Family Tree: Ancestral heritage of Marion Hornby, nee Jacques. Surnames include Walker, Dowling, Sadler, Gander, Fuller, Halfacre, Jerome, Marlow, Wheeler and Langley. |
| Jagt: General interest and single lineage of oldest retreivable ancestor Hendrik (b.abt.1688) compiled by René Jagt, presented by Marc Jagt. |
| Jahnke Family: Ancestral tree, photograph album, recipes and projects of Greg, Andi and Thomas Jahnke. |
| Jandebeur Family: For the ancestors of Michael Joseph Jandebeur to meet and post comments. Details of the annual family reunion can be found here. |
| Janson Family: Ancestors and decendents of Martin Janson. Surnames include Bonar, Backscheider, Dexter, Grebner, Strassel, Megel, Fegele and Simon. |
| Janvrin: Family history of Lance K Janvrin Snr, Lynn, MA USA. |
| Janzen and Jantzen: Mennonite Jan(t)zens or similar spelling in Westprussia especially before 1800. |
| Jarboe: Family history including surnames Denton, Paulson, Bagby and Brummett. |
| Jarrell: Ancestors of Don Jarrell including surnames Burton, Westell, Waistell, McKay and Finlayson. |
| Jarry: Ancestors and descendants of Pascal André Octave Jarry and Clotilde Marie-Pierre Madeleine Sentis. |
| Jenkyn: Family tree including the surnames Bartel, Batle, Cawthern, Cauthern and Williams. |
| Jernigan: Amber's Family Treehouse: Ancestral history from Sicily to the USA. |
| Jesberger: Family history of Richard G Jesberger including German ancestors and photographs. |
| Jess Family Tree: Family database as compiled by Thomas Jess. |
| Jessop Family: Family history of Graham and Fiona Jessop from Norwich, England. |
| Johannsmeyer: Family database compiled by William L Johnsmeyer. Features the lineage that originated in Rattinghausen, Germany, near the town of Bad Essen. |
| Johns: Family tree including Bush, Alden, Stockwell and Stebbins. |
| Jonas-Knight-Grimshaw: Ancestral database as compiled by Denise Jonas. |
| Jordan: Established to find matches between the various family lines. Includes Y testing kit and current results. |
| Jordanas: Origin of the family name and Spainish connections. Features the descendants of Jose Jordana Font and Ana Centenera. Areas covered include Spain, the Philippines, Australia and the USA. |
| Jorgenson: Family history of Conrad M Jorgenson from Sortland, Norway who settled in the Great Falls Montana area in 1907. Compiled by Gary Steven Jorgenson. |
| Jowers: Family history of Carl and Myra Jowers including surnames Barlow, Harden, Lankford Bane, Barco, Cozene and Lee. |
| Jumper Family History: Ancestral heritage of Samuel Jumper as compiled by Sherry A Jumper. Includes pedigree tree, photographs and associated lineages. |
| Junge Family Tree: Ancestor and descendants charts, relationship calculator and photographs. |
Classical
