About the Syrois-Duplessis surname
The surname Syrois-Duplessis is associated with a patronymic formation. Syrois-Duplessis is a compound surname. Its form combines several family-name elements; depending on the line, this may reflect a dit name, the joining of two surnames, or a more recent civil-status development. The surname may originally have expressed descent before becoming fixed as a hereditary family name. Syrois-Duplessis is a compound or hyphenated surname. For a particular family line, early records can show whether this form was long established or resulted from the joining of two surnames later in the family's history. In the normalization used for some LAFRANCE searches, the surname is also matched through the form “syrois duplessis”; this search variant can be useful when accents, spaces, or punctuation differ.
Pronunciation:
Si-roua-du-plè-si/siʁwadyplɛsi/