Does the word Septantrion that Nostradamus uses is for The Pleiades?

QUESTION: Hallo Alaje, Does the word Septantrion that Nostradamus uses is for The Pleiades? SEPTantrion ->SEPT -> SEVEN -> Seven Sisters -> Pleiades.

ANSWER: I dont know that word, but "Seven Sisters" is an ancient word for the Pleiades.