| SURNAME | LOCATION | COUNTRY | TIME FRAME | CONTACT |
|---|---|---|---|---|
| IRONMONGER | Derbyshire | England | 1680+ | Mona Cashman |
| JACKSON | England | 1891+ | Warren Jansen | |
| JACKSON | Abbotsford, British Columbia | Canada | Pre 1924 | Warren Jansen |
| JACQUES | France | Pre 1650 | Robert Gilbert | |
| JACQUES | Charlesbourg, Quebec | Canada | 1650-1750 | Robert Gilbert |
| JAMES | Gorran, Cornwall | England | Pre 1869 | Christol Gilbert |
| JAMES | Ontario Co., Ontario | Canada | 1869+ | Christol Gilbert |
| JAMES | Simcoe Co. Ont. | Canada | 1891+ | Christol Gilbert |
| JAMIESON | Brooklyn, New York | USA | 1931 | Doreen Jamieson |
| JANSEN | Winnipeg, Manitoba | Canada | Aft 1911 | Warren Jansen |
| JANSEN | Abbotsford, British Columbia | Canada | 1924-1970 | Warren Jansen |
| JEFFERY | Gorran, Cornwall | England | Pre 1869 | Christol Gilbert |
| JENKINS | Northfleet, Kent | England | 1825-1891 | Candy-Lea Chickite |
| JOCKEL | Germany | Pre 1862 | Gladys Ellis | |
| JOCKEL | Edinburgh | Scotland | 1862-1888 | Gladys Ellis |
| JOHNSTON | Aberdeen | Scotland | 1818+ | Angela Smith |
| JOHNSTON | Ontario | Canada | 1859-present | Angela Smith | JOLLYMORE JOLLIMORE | Nova Scotia | Canada | All | Dorothy Ballard |
| JOLY (dit DELBEC) | Quebec Co., Quebec | Canada | c1650-1750 | Robert Gilbert |
| JONES | Abergavenny, Monmouthshire | Wales | Pre 1840 | Carolyn Henshall |
| JONES | Monroe Co., New York | USA | 1840-1855 | Carolyn Henshall |
| JONES | Bay Co., Michigan | USA | 1855-present | Carolyn Henshall |
| JONES | Dublin | Ireland | c1868 | Donna Cox | JOY | Devon | England | 1600-1900 | Dorothy Ballard | JOYCE | England | 1850-1890 | Kathleen Joyce |
| KARLSSON | Sweden | Angela Smith | ||
| KARLSSON | St. Louis Co., Minnesota | USA | Angela Smith | KELF | Norwich, Norfolk | England | 1800-1900 | Judy Norberg | KELL | Acomb/St. John Lee/Hexham, Northumberland | England | 1768+ | Trudi Barr |
| KERSTING | London | England | 1700-1850 | Marion Summerer |
| KING | Prince Edward Co., Ontario | Canada | 1830-1880 | Debra Parminter | KINGDON | Rosehash, Devonshire | England | 1800-1847 | Kathryn Kingdon | KINGDON | Ontario | Canada | 1840+ | Kathryn Kingdon | KLUKAS | Poland, Volhiynia | Russia | Pre 1891 | Pat Loftin | KLUKAS | Bruderfeld, Alberta | Canada | 1891+ | Pat Loftin | KLUKAS | Haylakes, Alberta | Canada | 1891+ | Pat Loftin | KLUKAS | Leduc, Alberta | Canada | 1891+ | Pat Loftin | KLUKAS | New Sarepta, Alberta | Canada | 1891+ | Pat Loftin |
| KNAPTON | Yorkshire | England | 1826+ | Gladys Ellis | KNEE | England | c1788 | Kathy Coward | KURTZ | Baden-Wurttemberg | Germany | c1830 | Sue Ridley | KURTZ | Sacramento Co., California | USA | 1870+ | Sue Ridley | KURTZ | Crawford Co., Ohio | USA | 1845+ | Sue Ridley | KURTZ | Auglaize Co., Ohio | USA | 1880+ | Sue Ridley | LaBONTÉ LaBOUNTY | Michigan | USA | c1850-1900 | Robert Gilbert | LaBONTÉ LaBOUNTY | Quebec | Canada | c1750-1800 | Robert Gilbert |
| LABRECQUE | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LACASSE | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LACASSE | Ontario | Canada | Anytime | Rita Moreau Suzanne Prosser |
LAHAY | Quebec | Canada | 1855-2000 | Laurel Lahay | LAHAY | Simcoe County, Ontario | Canada | 1855-2000 | Laurel Lahay |
| LAMBERT | Vancouver, British Columbia | Canada | 1900s | Gladys Ellis |
| LANCASTER | Ambleside,Cumbria | England | c1870 | Glennys Holliday |
| LANFRANCO | Italy | Angela Smith | ||
| LANFRANCO | British Columbia | Canada | Angela Smith | |
| LANK | Aslackby, Lincolnshire | England | Pre 1881 | Christol Gilbert |
| LANK | Bourne, Lincolnshire | England | Pre 1881 | Christol Gilbert |
| LANK | Simcoe Co., Ontario | Canada | 1881+ | Christol Gilbert |
| LAPORTE | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LAPORTE (dit ST. GEORGES) | Berthier, Quebec | Canada | 1650-1790 | Robert Gilbert | LARGE | Allesley, Warwickshire | England | 1700-1800 | Patricia Goddard | LARIVIERE | Quebec | Canada | 1800+ | Sue Duval |
| LAROCQUE (dit ROCHBRUNE) LAROCQUEBRUNE | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LAROCQUE (dit ROCHBRUNE) LAROCQUEBRUNE | Ontario | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LARSON | Norway | 1850 | Angela Smith | |
| LARSON | USA | 1869+ | Angela Smith | |
| LAURIE | Kirkudbright | Scotland | c1800s | Gladys Ellis |
| LAURIE | Penninghame, Wigtown | Scotland | 1835-1837 | Gladys Ellis |
| LAURIE | Vancouver, British Columbia | Canada | 1900s | Gladys Ellis |
| LAURIN | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LAURIN | Ontario | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LAW | England | pre 1889 | Christol Gilbert | |
| LAW | Durham County, Ontario | Canada | 1889-1960 | Christol Gilbert |
| LAWSON | Woolwich, Kent | England | 1870-1950 | Laurel Lahay |
| LAYTHAM | Habergham, Lancashire | England | early 1800s | Dee Soderholm |
| LAYTHAM | Bakewell, Derbyshire | England | 1850s | Dee Soderholm |
| LAYTHAM | Teddington, Surrey | England | Late 1800s | Dee Soderholm | LEAR | Longport, Staffordshire | England | 1800+ | Joyce Bak | LEAR | Burslem, Staffordshire | England | Pre 1800 | Joyce Bak |
| Le CORRE | Scaër, Brittany | France | 1875-1913 | Muriel Bakker |
| Le CORRE | Morbihan | France | 1880-1900 | Muriel Bakker |
| LECUYER | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LEFEVRE | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LENTON | Kilincote/Kimcote/Kibworth, Leicestershire | England | 1700s | Mary Lou Bennett |
| LEVICK | Eckington, Derbyshire | England | Pre 1914 | Christol Gilbert |
| LEVICK | Ontario & Simcoe Co., Ontario | Canada | 1912+ | Christol Gilbert | LEWIN | South Croxton, Leicestershire | England | 1600s-1900s | Phyllis Ring | LEWIN | Billesdon, Leicestershire | England | 1600s-1900s | Phyllis Ring | LEWIN | Syston, Leicestershire | England | 1600s-1900s | Phyllis Ring |
| LIMOUSIN dit BEAUPORT | Quebec | Canada | Anytime | Rita Moreau Suzanne Prosser |
| LIND | Vaasa | Finland | Katie Hine | LIPSACK LOEBSACK | Volga | Russia | Pre 1900 | Pamela Cox |
| LOBENSCHUSS | All | Austria | 1800s | Marion Summerer | LOMAS | Leek Parish, Staffordshire | England | 1600+ | Donna Cox | LONDON | Tonbridge, Kent | England | 1600+ | Margaret Chapman | LONDON | Leigh, Kent | England | 1600+ | Margaret Chapman | LONDON | Southend-on-sea, Essex | England | 1800+ | Margaret Chapman | LORD | Great Oakley, Essex | England | 1700-1800s | Phyllis Ring |
| LOSIE | Northumberland Co., Ontario | Canada | 1800+ | Debra Parminter | LOUGHLEAN | Bruce & Grey Co,'s, Ontario | Canada | 1825+ | Joyce Fish | LOUGHLEAN | Ireland | Pre 1825 | Joyce Fish |
| LOUIS | Yukon/North West Territories | Canada | Angela Smith | LOWE | Fitchber & Worcester, Maine | USA | 1826-1898 | Marian Stringer |
| LUGSDIN | Bedfordshire | England | 1700s-1800s | Judy Kennedy |
| LUGSDIN | Toronto,Ontario | Canada | 1850s+ | Judy Kennedy |
| LYONS | Ireland | 1800s | Glennys Holliday | |
| LYONS | Owen Sound, Ontario | Canada | 1800s | Glennys Holliday |