It spells Mismarich and in ancient documents is written in different ways. It draws thought the name of the population Celto - Gallics "Mediomatrici", which is already twice mention by Cesare in De Bello Gallico, as well as Plinio and Tacit. You can note that there are many names that in Italy and France have the first part consists of Medio or by Mezzo. What does that mean? It would say, of the lancers, archers, place that, as assume, the legendary General Belloveso dropped by Gallia in command of its "Mediomatrici" to 17th century b. C. has established his tent between this hill after having plundered and destroyed the same town of Novara.
But the authors for one assumption think of the people of the Ligures as the founders of Mezzomerico, the Marici who, escape from the dangers of the sea or for the revenge of pirates, fled this distant hinterland hence to find a quiet and serene life. Metromaricum would signnify then the chief town of Marici. There are many conflicting versions, but they assure us on one point: is an ancient country.