This list of ancient peoples living in Italy summarises the many different Italian populations that existed in antiquity.
On the other hand, some Italian peoples (such as the Rhaetians, Camuni, Etruscans) likely spoke non- or pre-Indo-European languages.
Some of them were Pre-Indo-Europeans or Paleo-Europeans while, with regard to some others, Giacomo Devoto proposed the definition of Peri-Indo-European (i.e. everything that has hybrid characters between Indo-European and non-Indo-European).
This could imply that they are descended from a common ancestor and/or Proto-Celtic and Proto-Italic developed in close proximity over a long period of time.
[42] Overall, the genetic differentiation between the Latins, Etruscans and the preceding proto-villanovan population of Italy was found to be insignificant.