| Interest Name | Parish/ Town | County | Period | No | Name | |
| Jackson | Nuneaton | WAR | 1880+ | 62 | Mrs Blanche E Barratt | andy@skilodge.fsnet.co.uk |
| Jackson | Stalybridge | LAN | Pre 1850 | 49 | Mr Gordon & Mrs Sheila Mears | gadsby65@mts.net |
| Jackson | Cleckheaton | WAR | All | 140 | Mr Anthony H Hawthorne | email membership secretary for contact details |
| Jackson | Ansley / Grendon / Atherstone | WAR | c1815 | 219 | Mr K W Crump | email membership secretary for contact details |
| Jackson | Ansley | WAR | c1800-1820 | 219 | Mr K W Crump | email membership secretary for contact details |
| Jackson | Nawton / Beadlam | YKS | All | 113 | Mrs Pamela Hankinson | email membership secretary for contact details |
| Jacques | Bedworth | WAR | Pre 1813 | 255 | Mrs Elaine Davenport | elaine.davenport2@btinternet.com |
| Jacques | Griff / Bedworth | WAR | 1905 | 111 | Mrs June Robinson | junerobinson309@btinternet.com |
| James | St Mary's | PEM | All | 106 | Mrs Dorothy Davies | dotmdavies@aol.com |
| Jaques | Bedworth / Nuneaton | WAR | Pre 1890 | 116 | Mrs P M R Hole | email membership secretary for contact details |
| Jarrett | Deddington | OXF | 1800+ | 71 | Mrs Sheila M Dunn | sheilaandjohndunn@tiscali.co.uk |
| Jee | Exhall | WAR | Pre 1850 | 264 | Mr Tony Bennett | ajtonyb@tiscali.co.uk |
| Jefcoate | Nuneaton | WAR | Pre 1800 | 77 | Mr Ian Allan Hodgkinson | ihodgkinson933@btinternet.com |
| Jefcott | Arley | WAR | Pre 1830 | 71 | Mrs Sheila M Dunn | sheilaandjohndunn@tiscali.co.uk |
| Jeffcoate | Chilvers Coton / Stockingford | WAR | All | 163 | Mrs Kathleen O'Farrell | kathleenofarrell@btinternet.com |
| Jeffcoate | Leicester | LEI | 1900+ | 163 | Mrs Kathleen O'Farrell | kathleenofarrell@btinternet.com |
| Jeffcoate | Nuneaton | WAR | Pre 1900 | 26 | Mr Roy Hopkins | royhopkins@shambles10.wanadoo.co.uk |
| Jeffcoate (and variants) | Mancetter | WAR | Pre 1830 | 103 | Mr Daryl Jones & Ms Heather Evans | Dary1j766@aol.com |
| Jeffcot / Jeffcotte | Nuneaton | WAR | 1850-2002 | 173 | Mrs Cecilia Roberts | celia_roberts@btinternet.com |
| Jeffcote | Nuneaton | WAR | Pre 1820 | 3 | Mr Steve Casey | stephenjcasey@hotmail.com |
| Jeffcote & variants | Nuneaton | WAR | All | 174 | Mrs Karen Halbert | karenhalbert@btopenworld.com |
| Jeffcote / Jeffcoate | Nuneaton | WAR | 1850-2002 | 173 | Mrs Cecilia Roberts | celia_roberts@btinternet.com |
| Jeffcutt | Great Packington | WAR | Pre 1740 | 3 | Mr Steve Casey | stephenjcasey@hotmail.com |
| Jefferies | Curdworth | WAR | Pre 1840 | 68 | Mrs Jacqui Simkins | wesimkinsandson@btconnect.com |
| Jefferies / Jeffries | Chilvers Coton | WAR | 1834-1848 | 224 | Mrs Hilary Hodgkins | rhodgkins@btinternet.com |
| Jefferies / Jeffries | Bedworth | WAR | 1848-1884 | 224 | Mrs Hilary Hodgkins | rhodgkins@btinternet.com |
| Jelley | Nuneaton | WAR | 1800-1840 | 10 | Dr David Hands | dave.hands@blueyonder.co.uk |
| Jelley | Leicester | LEI | Pre 1820 | 10 | Dr David Hands | dave.hands@blueyonder.co.uk |
| Jelley | Rutland | RUT | Pre 1800 | 10 | Dr David Hands | dave.hands@blueyonder.co.uk |
| Jelley | Nuneaton | LEI | pre 1820 | 74 | Mrs Gillian Jenkins | jenkins42@supanet.com |
| Jenkinson | Nuneaton | WAR | 1880+ | 118 | Mrs Barbara Kingman | email membership secretary for contact details |
| Jennings | Mancetter | WAR | 1750 | 23 | Mrs K M Kozlowski | krimar@btinternet.com |
| Jephcott | Mancetter / Bulkington / Bedworth | WAR | Any | 260 | Mr David Hutt | davis@hutt3221.freeserve.co.uk |
| Jervis | Tredegar Monmouth | WALES | All | 120 | Mrs Marlene Pearce | me.pearce1@googlemail.com |
| Jeynes | North Warwickshire | WAR | 1850+ | 190 | Mr Malcolm & Mrs Jackie Gregory | jacmal@jacmal.wanadoo.co.uk |
| Johnson | Rocester | STS | 1850-1900 | 232 | Mrs Dorothy Joyce Rolfe | D.Rolfe@btinternet.com |
| Johnson | Doveridge | DBY | Pre 1880 | 232 | Mrs Dorothy Joyce Rolfe | D.Rolfe@btinternet.com |
| Johnson | Nuneaton | WAR | All | 75 | Mr Derek G Wright | derek.wright37@tesco.net |
| Johnson | Charlecote | WAR | Pre 1800 | 128 | Mr David N Fordham | hermit@sequoia.freeserve.co.uk |
| Johnson | Nuneaton / Coventry | WAR | All | 127 | Mr Richard Powers | richard.powers@btopenworld.com |
| Johnson | Hucknall | NTT | All | 214 | Mrs Linda Boden | theones.beforme@ntlworld.com |
| Johnston | Carlisle | CUL | All | 279 | Mrs Joyce Shilton & Deborah Partridge | joyce_shilton@yahoo.co.uk |
| Jones | Llanafan / Llandewi Brefi | CGN | All | 103 | Mr Daryl Jones & Ms Heather Evans | Dary1j766@aol.com |
| Jones | Birmingham | WAR | 1850 - 1880 | 15 | Mrs Eileen Noakes | ednoakes@talktalk.net |
| Jones | Tredegar / Llandiloes / Llangurig | WALES | All | 120 | Mrs Marlene Pearce | me.pearce1@googlemail.com |
| Jones | Burton on Trent | STS | 1840-1860's | 211 | Mrs Patricia Ann Nixon | patandjohnnixon@tiscali.co.uk |
| Jones | Bishops Castle | SAL | Pre 1913 | 183 | Mrs Sue Burton | sueandian@talktalk.net |
| Jones (Evan David) | Aberystwyth area | CGN | 1892-1965 | 103 | Mr Daryl Jones & Ms Heather Evans | Dary1j766@aol.com |
| Jones (Samuel) | Monmouthshire | MON | 1881-1937 | 282 | Mr D A & Mrs Margaret A Davenport | davenport537@aol.com |
| Jordan | Coventry/Bagington/Cubbington | WAR | Pre 1900 | 53 | Mr Victor Alan Terry | vic.terry@tesco.net |
| Jowett | Atherstone | WAR | c1853 | 196 | Mrs Edna Forknall | eforknall@aol.com |
| Jowett | Higham on the Hill | LEI | c1827 | 196 | Mrs Edna Forknall | eforknall@aol.com |
| Jowett | Sibson | LEI | Pre 1782 | 49 | Mr Gordon & Mrs Sheila Mears | gadsby65@mts.net |
| Joyce | Stockingford | WAR | 1800-1960 | 152 | Mrs Jill Joyce | email membership secretary for contact details |
| Joyce | Twycross | WAR | All | 152 | Mrs Jill Joyce | email membership secretary for contact details |
| Joyce | Nuneaton | WAR | All | 152 | Mrs Jill Joyce | email membership secretary for contact details |
| Judd | Forest Gate | ESS | 1880+ | 128 | Mr David N Fordham | hermit@sequoia.freeserve.co.uk |
| Judd | Warmington | WAR | 1880-1920 | 71 | Mrs Sheila M Dunn | sheilaandjohndunn@tiscali.co.uk |