In historical linguistics, an Urheimat /ˈʊərhmɑːt/ (from German ur- "original" and Heimat, home, homeland) is the area of origin of the speakers of a proto-language, the (reconstructed or known) parent language of a group of languages assumed to be genetically related.

Depending on the age of the language family under consideration, its homeland may be known with near-certainty (in the case of historical or near-historical migrations) or it may be very uncertain (in the case of deep prehistory). The reconstruction of a prehistorical homeland makes use of a variety of disciplines, including archaeology and archaeogenetics.

Archaeological evidence (e.g., Bellwood 1997) suggests that speakers of pre-Proto-Austronesian spread from the South Chinese mainland to Taiwan at some time around 6000 BCE. Evidence from historical linguistics suggests that it is from this island that seafaring peoples migrated, perhaps in distinct waves separated by millennia, to the entire region encompassed by the Austronesian languages (Diamond 2000). It is believed that this migration began around 4000 BCE (Blust 1999)

... the internal diversity among the... Formosan languages... is greater than that in all the rest of Austronesian put together, so there is a major genetic split within Austronesian between Formosan and the rest... Indeed, the genetic diversity within Formosan is so great that it may well consist of several primary branches of the overall Austronesian family.

Archaeological evidence (e.g., Bellwood 1997

It is possi

It is possible that the ancient Taiwan aborigines were related to the ancient Minyue, derived in ancient times from the southeast coast of Mainland China, as suggested by linguists Li Jen-Kuei and Robert Blust. It is suggested that in the southeast coastal regions of China, there were many sea nomads during the Neolithic era and they may have spoken ancestral Austronesian languages, and were skilled seafarers.