Therrien
A French surname, probably from an old personal name or regional form, now most strongly associated with French Canada.
The #6,865 most common surname in the United States (2010 Census) — about 1 in every 63,009 Americans shares it.
Etymology
Therrien is a French surname, most likely built from a given name rather than from a place or occupation. In many cases it is treated as a variant spelling or regional form connected with the personal name Thierry, from Germanic roots meaning "people" and "ruler." As with many French surnames, the exact path from given name to hereditary family name can vary by region and record-keeping.
History
The name is especially well known in French-speaking North America, particularly Quebec and Acadian-descended communities, where French surnames often preserved older regional spellings. It likely entered hereditary use in France before spreading across the Atlantic with French settlers. In modern usage, Therrien remains relatively concentrated in francophone areas compared with the wider French-speaking world.
Origin
Regions
Variant spellings
Fun fact
French-Canadian surnames often preserve spellings that are uncommon or rare in France itself, which is one reason names like Therrien can feel distinctly regional.