- Johnston
- Features membership, merchandise, and more for researchers of Johnston or Johnstone heritage. - Josey
- Tracing the Josey family origins in Aldworth, U.K. circa 1640 to the present day worldwide. - (AU) (NZ) Jack
- Jack/Beaumont emigrated to New Zealand c1870. Researching Brown, Burgess, Hayes, Perriam lines, and more. - Jesenovec
- Slovenian genealogy. - Jeremiah
- Tracing the family from Carmarthenshire and Cardiganshire in South Wales. - Johnson (1)
- Jaeger
- Traces the family tree from its origin in Alsace, starting in 1676. - Jackson (2)
- Jones (2)
- Jennings (1)
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