Since the myth was probably based on historical events, this could indicate that the Tricastini were already living in Gaul, possibly near their attested homeland, at the time of the Battle of the Allia (387 BC), from which the legend is apparently inspired, although the tribal names may also have been taken from names current at the time of Livy. At any rate, the archaic form of the name "Tricastini" probably indicates an ancient ethnogenesis. Although it is attested in the Roman era, the name is not affected by the well-known Gaulish -"st"- &gt; -"ss"- sound shift, which suggests a fossilization of the ancestral ethnonym, possibly in a moutainous area.