as well. The origin of a hypothetical ancestral "Italo-Celtic" people is to be found in today's eastern Hungary, settled around 3100 BCE by the Yamnaya culture. This hypothesis is to some extent supported by the observation that Italic shares a large number of isoglosses and lexical terms with Celtic and Germanic, some of which are more likely to be attributed to the Bronze Age. In particular, using Bayesian phylogenetic methods, Russell Gray and Quentin Atkinson argued that Proto-Italic speakers separated from Proto-Germanics 5500 years before present, i.e. roughly at the start of the Bronze Age. This is further confirmed by the fact that the Germanic language family shares more vocabulary with the Italic family than with the Celtic language family. From the late third to the early second millennium BCE, tribes coming both from the north and from Franco-Iberia brought the Beaker culture and the use of bronze smithing, to the Po Valley, to Tuscany and to the coasts of Sardinia and Sicily. The Beakers could have been the link which brought the Yamnaya dialects from Hungary to Austria and Bavaria. These dialects might then have developed into Proto-Celtic. The arrival of Indo-Europeans into Italy is in some sources ascribed to the Beakers. A migration across the Alps from East-Central Europe by early Indo-Europeans is thought to have occurred around 1800 BCE. According to Barfield the appearance of Polada culture is connected to the movement of new populations coming from southern Germany and from Switzerland. According to Bernard Sergent, the origin of the Ligurian linguistic family (in his opinion distantly related to the Celtic and Italic ones) would have to be found in the Polada and Rhone cultures, southern branches of the Unetice culture. These individuals settled in the foothills of the Eastern Alps and present a material culture similar to contemporary cultures of Switzerland, Southern Germany, and Austria. In the mid-second millennium BCE, the Terramare culture developed in the Po Valley. The Terramare culture takes its name from the black earth (terra marna) residue of settlement mounds, which have long served the fertilizing needs of local farmers. These people were still hunters, but had domesticated animals; they were fairly skillful metallurgists, casting bronze in moulds of stone and clay, and they were also agriculturists, cultivating beans, the vine, wheat and flax. The Latino-Faliscan people have been associated with this culture, especially by the archaeologist Luigi Pigorini. Late Bronze Age