Brambillasca is specific to the area that includes Carugate, Agrate Brianza and Monza, the suffix -asca refers to the root Brambilla with the meaning of belonging or participation, it could therefore refer to ancestors from the Valle Brembilla or from the town of Brembilla in the Bergamo area, with dialectal opening of the e until it becomes an a, it is also possible a reference to the toponym Brambilla di Concorezzo, but much less likely.
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