Finally, Anna Fortunata Brivio (+ 1732) married Pietro Agnesi and was mother of the famous mathematician Maria Gaetana Agnesi.
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Founder of the family was Pietro Brivio (in Latin: Petrus Brivius or Petrus de Brippio), who moved at the end of the 15th Century from Milan to Montevecchia, where he had bought many properties.
Monte Marenzo borders the following municipalities: Brivio, Calolziocorte, Cisano Bergamasco, Torre de' Busi.
He was also related to Giovanni II Visconti, and already held a few benefices such as the Provost of Brivio and as the Archpriest of the Metropolitan Church of Milan.