What a dit name tells you
A dit name is an additional surname or nickname connected to another surname. Library and Archives Canada gives Miville dit Deschênes as an example. The custom continued from France into New France: some immigrants arrived with an additional name, while others acquired one after settlement. Military usage was one context, but nicknames could also refer to characteristics, occupations, places or relatives. Library and Archives Canada explains these patterns.
Treat the expression as a clue to identification. It does not, by itself, establish a marriage connection, noble status or a relationship to every other bearer of either surname.
Two names did not always travel together
The Drouin Institute describes dit names that arose in different generations, passed to descendants unevenly or applied to only part of a family. Its Roy dit Desjardins example shows why researchers should consider Roy, Desjardins and the combined form. Search each surname separately as well as together. Drouin’s explanation includes this example.
Library and Archives Canada places a broad shift toward using one name around the 1850s. Use that as orientation, not a cutoff for an individual family: establish the sequence from dated records. Its account concerns French Canadian naming history; do not assume identical timing across Quebec, Acadian communities and later migrant destinations.
The existing Roy surname guide provides a separate starting point for name history. A surname’s etymology explains a name; a documented chain of relationships establishes ancestry.
| Search form | Purpose | Limit |
|---|---|---|
| Roy | Look for records using the first surname alone. | A Roy result does not establish the dit-name association. |
| Desjardins | Look for records using the additional surname alone. | A Desjardins result does not establish descent from a Roy line. |
| Roy dit Desjardins | Look for the explicitly connected form. | Even a full name match requires comparison of identifying details. |
Build the connection one record at a time
Use this workflow to test a possible match:
- Anchor the search in a known event. Record its date, locality and the relationships it actually identifies.
- Preserve the wording. Transcribe the name as written before adding a normalized search version. Keep the record image and its archival reference alongside the transcription.
- Compare identities, not just names. Check parents, spouse, residence, occupation and chronology wherever the documents supply them. Note missing information rather than filling it from expectation.
- Seek a bridge. Look for an independently identifiable person appearing with the combined name, or for records linking the same couple and children across the different forms.
- Test competing explanations. A similar name could belong to a contemporary in another household. Investigate conflicting spouses, incompatible dates or overlapping lives before merging entries.
Record your conclusion separately from the evidence. ‘Possible match because the spouse and locality agree’ is more useful than silently treating the connection as proved. For further guidance, see How Parish Registers Preserved Surnames and the Beginner Genealogy Source-Rating Guide.
Keep migration and administrative context visible
When a research trail crosses a border, compare the last securely identified record before the move with the first secure record afterward. Search using known relatives and places as well as surname variants. Do not assume that a difference first noticed after migration was created at the border.
For every entry, note who produced the document, where it was recorded, its date and whether you consulted an image, transcript or index. Keep the document’s spelling separate from any spelling supplied by a database. If an index search fails, inspect the relevant register where available before concluding that the event is absent.
Avoid imposing a single surname on every generation for convenience. Preserve each attested form and explain why you believe the records concern the same person. The guide to related surname spellings offers a complementary research approach.
Use name associations as leads
Drouin describes surname–nickname association tools for identifying possible alternative searches. Those associations point toward records; they do not identify your ancestor on their own. Its research guide explains the tools’ purpose.
Keep three questions separate: what a name means, where a naming pattern is documented, and which people belong in your family line. A plausible answer to either of the first two does not settle the third. This article explains the naming pattern and a research method; it does not establish a pedigree for any named family.
Sources
- Library and Archives Canada, “The nicknames and ‘dit names’ of French-Canadian ancestors” (2014). Historical overview, examples and reference works.
- Institut Drouin, “French-Canadian ‘dit names’ and nicknames” (2019). Variation within families, the Roy dit Desjardins example and surname-association searches.