The name "La Romaine" is the French adaptation of the word "Ulaman". Before its spelling was standardized, the place has also been called in times past: Fort Romaine, Olomanshibu, Olomenachibou, Ulimine, Ouromane, Olomanoshibou, Olomano, Romaine, La Romaine, Grande-Romaine, Gethsémani-d'Olumen, Gethsémani, Uanaman Hipiht, Ulamen Shipit, and Ulaman Shipu. These names applied sometimes to the old post, sometimes the village or the reserve, or sometimes to the river that flows through the place. Except for Gethsémani, all these variations have the same source: , from meaning "vermilion" or "red ochre", and meaning "river". Deposits of this material are found on the banks of the Olomane River.