dna next to a surname below indicates it has been registered with the DNA linking service
and the researcher is keen to find bearers of the same surname to join a DNA project.
ons next to a user below means the user has registered a one-name study of a surname
with the Guild of One-Names Studies.
| Surname | Timeframe | Place | Researcher |
|---|---|---|---|
| IAN | 1960 -1970 | Any | Ralph |
| IBELL | 1800-1900 | anywhere | Stephanie Chin |
| ICHCOCK | Any | Alkerton, Shenington | John Hitchcox |
| ILBERY | 1841-1869 | Any | Marilynn Kaye Weems |
| ILES | 1830-1860 | Ditchley Park | Paul Evans |
| ILES | 1700 - 1900 | Longcot, Baulking, Eaton Hastings, Buscot | Kaye Saunders |
| ILES | Any | Coleshill | Kevin Harris |
| ILLING | Any | Woodstock | Nadine Schofield |
| ILOTT | Last 300 years | Brize Norton, Faringdon, Bampton | Sally Hamilton |
| ILOTT | 1750-1800 | Any | Joyce Lark |
| IMPEY | Any | Stadhampton | Alexandra Coles |
| ING | 1700s | Wroxton, Balscote | Sheila Matthews |
| INGERSOLL | >1568 | Any | Melissa Ward |
| INGRAM | Any | Any | Paul Landon |
| INGRESOLE | >1568 | Any | Melissa Ward |
| INGWOOD | 1780-1880 | Stratton Audley | Alan Clarke |
| INKERSALL | >1568 | Any | Melissa Ward |
| INMAN | Any | Any | Jim Williams |
| INMON | Any | Any | Jim Williams |
| INNES dna | <1790 | Cumnor | Jenny Lockett |
| INNESS | <1900 | north oxford city | Alan W. Inness |
| INNESS | <1700 | Any | Min Inness |
| INNS | 1850 to 1950 | Oxford | Dan Morkeberg |
| INNS | <1818 | Banbury | Steve Kirby |
| INSALL | >1900 | Chipping Norton | Miss Désirée de Nantes |
| INWOOD | 1850-1900 | St Clement, Cowley St John | Dave Stevenson |
| INWOOD | Any | Oxford | Patrick Inwood |
| IONS | Any | Great Tew, Little Tew, Marston | Elizabeth Bradbury |
| IORNS | 1840 | Deddington | Clifford Davenport |
| IRELAND | Any | Milton-under-Wychwood | Mandy Smith |
| IRESON | Any | Any | Becky Harris |
| IRESTON | Any | Any | Becky Harris |
| IRISH | >1700 | Any | Donna Chippewa |
| IRISH | 1710 | Any | Dana Edgecomb |
| IRISH | 1650 | Any | Sally Kennamer |
| IRONS | 1600-1900 | Bloxham.Barfords St John, Barford St Michael, Deddington | Carol Murray |
| IRONS | Any | Bloxham | Elizabeth Coyle |
| IRONS | Any | Great Tew, Little Tew, Marston | Elizabeth Bradbury |
| IRVING | <1915 | Henley-on-Thames | Marlene Frechette |
| IRVING | Any | Russell's Water, Henley on Thames, Pishill, Northend, Assendon | Maurice Irwin |
| IRWIN | Any | Russell's Water, Henley on Thames, Pishill, Northend, Assendon | Maurice Irwin |
| ISAAC | Any | Kingham, nr. Idbury | Malcolm Barnes |
| ISBELL | 1700 - 1900 | Any | Shirley Isbill |
| ISBILL | 1700 - 1900 | Any | Shirley Isbill |
| ISCAC | 1600-1700 | Any | Jo Tuttle |
| ISITT | 1800s | Ardley, Bicester | Clare Reader |
| ISLE | 1600 | Any | John Isle |
| ISLES | 1851 | CHIPPING NORTON | Isles |
| ISMAN | <1730 | Any | Peter Eastman |
| IVENS | 18c | Swinbrook | Gui Maia de Loureiro |
| IVENS | >1840 | Wroxton | Christine Yarwood |
| IVES | >1800 | Any | M Cooper |
| IVES | Any | Banbury | Joey Fraser |
| IVES | 1700-1850 | Shiplake | Peggy Haire |
| IVES | 1780 - 1860 | Bix and Henley | Joan Henstock |
| IVES | <1800 | Great Milton | Jill C. Major |
| IVES | Any | Any | Mike Trinder |
| IVINGS | Any | Any | Sue Sargent |
| IVINGS | Any | Oxford | Margaret Wilson |
| IVINGS | Any | Any | Keith A. Jennings |
| IZZARD | 1800-1900 | Neithrop, Banbury | Iris Smith |