About the Thérrien Thérien surname
The surname Thérrien Thérien has an onomastic interpretation that still needs to be placed in the history of each family line. The form of Thérrien Thérien is compatible with French surname tradition. It may derive from an old given name, a place, a nickname, an occupation, or a regional variant; the historical form of the family line is needed to distinguish between these possibilities. This interpretation helps explain the formation of the surname without establishing the origin of any particular family line. Thérrien Thérien contains one or more diacritics in its canonical spelling. Historical or normalized indexes may omit them, which is useful to keep in mind during genealogical research.
Pronunciation:
Tér-jin-tér-jin/teʁjɛ̃teʁjɛ̃/