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Proposed relations with other families

Researchers have tried but have been unable to prove a connection between the Dravidian languages with other language families, including Indo-European, Hurrian, Basque, Sumerian, Korean, and Japanese. Comparisons have been made not just with the other language families of the Indian subcontinent (Indo-European, Austroasiatic, Sino-Tibetan, and Nihali), but with all typologically similar language families of the Old World. Nonetheless, although there are no readily detectable genealogical connections, Dravidian shares several areal features with the Indo-Aryan languages, which have been attributed to the influence of a Dravidian substratum on Indo-Aryan.

Dravidian languages display typological similarities with the Uralic language group, and there have been several attempts to establish a genetic relationship in the past. This idea has been popular amongst Dravidian linguists, including Robert Caldwell, Thomas Burrow, Kamil Zvelebil, and Mikhail Andronov. The hypothesis is, however, rejected by most specialists in Uralic languages, and also in recent times by Dravidian linguists such as Bhadriraju Krishnamurti.

In the early 1970s, the linguist David McAlpin produced a detailed proposal of a genetic relationship between Dravidian and the extinct Elamite language of ancient Elam (present-day southwestern Iran). The Elamo-Dravidian hypothesis was supported in the late 1980s by the archaeologist Colin Renfrew and the geneticist Luigi Luca Cavalli-Sforza, who suggested that Proto-Dravidian was brought to India by farmers from the Iranian part of the Fertile Crescent. (In his 2000 book, Cavalli-Sforza suggested western India, northern India and northern Iran as alternative starting points.) However, linguists have found McAlpin's cognates unconvincing and criticized his proposed phonological rules as ad hoc. Elamite is generally believed by scholars to be a language isolate, and the theory has had no effect on studies of the language. In 2012, Southworth suggested a "Zagrosian family" of West Asian origin including Elamite, Brahui and Dravidian as its three branches.

Dravidian is one of the primary language families in the Nostratic proposal, which would link most languages in North Africa, Europe and Western Asia into a family with its origins in the Fertile Crescent sometime between the Last Glacial Period and the emergence of Proto-Indo-European 4,000–6,000 BCE. However, the general consensus is that such deep connections are not, or not yet, demonstrable.