Thériot
A French surname most likely from a personal name, especially a regional form related to Thierry.
The #5,418 most common surname in the United States (2010 Census) — about 1 in every 48,061 Americans shares it.
Etymology
Thériot is a French surname that is generally understood as a diminutive or regional variant of Thierry, a traditional French given name. Thierry itself goes back to the Germanic name Theodoric, built from elements meaning "people" and "ruler." In that sense, Thériot originally meant something like "little Thierry" or "descendant of Thierry."
History
The surname is strongly associated with French-speaking areas, especially in North America, where it appears in Acadian and Louisiana French communities. As with many French surnames, spelling could vary widely in records, especially after migration into English-speaking regions. The modern concentration in the United States reflects that French colonial and later immigrant history.
Origin
Regions
Variant spellings
Fun fact
Many French surnames ending in -iot or similar forms began as affectionate or diminutive versions of given names.