Wyandot people
As in Saint-Maurice River, it was named in honour of the Lordship of Maurice Poulin La Fontaine. The land was a stronghold granted to his wife in 1676 near the mouth of the river. This "fief" (harvested area) was recognized in 1723 as the Saint-Maurice and the river, which previously denominated "River Three Rivers", was replaced by the current toponym for most of the 18th century. The river is also known Attikamekw under the name of "Tapiskwan Sipi" ("River of the threaded needle"). The Wyandot people know it under the name of Oquintondili and Abenaki under the name of Madôbalodenitekw.