About the Thérrien Terrien surname
The surname Thérrien Terrien has an onomastic interpretation that still needs to be placed in the history of each family line. The form of Thérrien Terrien 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. The general meaning of the surname should be distinguished from the history of each family that bears it. Thérrien Terrien 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-tèr-jin/teʁjɛ̃tɛʁjɛ̃/