Yes, Vic Cotroni was a captain in the Bonanno Family during the 60s and the 70s. It seems that he retired in 1975 and a split within the Montreal crew occured.
Paolo Violi was backed by Rastelli, while the Rizzutos seems to have been backed by Lilo Galante.
In the 80s the Montrealers were back into the Bonanno´s fold as one unit but if they were under the command of Gerlando Sciascia or some other Bonanno captain is hard to know.
Anyway, according to Sal Vitale´s testimony, Massino wanted to appoint Vito Rizzuto to the rank of a captain after the Sciascia murder in 1999. But the Rizzuto´s chose to sever themselves away from the New York Family´s influence by not accepting Massino´s appointment.
Because of the disarray that follwed within the Bonanno Family, I believe, the issue of the Montreal crew and it´s status with the Bonannos was never solved.