Sumerian civilization flourished about 3500 to 2000 BC in the Mesopotamia region of northern Africa and Asia Minor, between the rivers Euphrates and Tigris. John A.Halloran has reconstructed the Sumerican lexicon and its version 3 is available in the internet.Sumerian language was considered to the spoken and written language in what is now the southern Iraq, during the period 3400 to 1800BC.
Some of the words cited in Halloran's Sumerian lexicon have similar words in Tulu and other Dravidan languages.
Infact, origin of the word Tulu has been disputed for long.It is considered to represent something connected with water. 1.Tuluku (verb) in Kannada means to swish or oscillate or overflow (like water). 2.Tuluve in Tulu also means soft fruit especially refers to ripened soft watery jack fruits.
In the Sumerian lexicon the following entries are found:
1.Tul = public fountain, cistern, lowland or well .
Tu=wash , bath.(ie. activity connected with water)
2.Tu-lu = to make loose or limp.
(Numbers 1, 2 ..shown for relevant comparisons)
Ur or Uru (=city) was a major city during Sumerian civilizatin times. The word Uru or Ooru ( village or township) has got into almost all Dravidan languages including Tulu.Possibly the the name of the once famous Sumerian city was extended to all civilized settlements later on.It is a common suffix now in most of the place names in southern India. Mangalur,Bengalur,Mundkur,Arialur,Trichur,Gudur etc.
Possibly, the suffix -ur became -pur or -pura in Sanskrit. Jaipur,Udaipur,Mathura,Nagpur, Shivpura, etc.
There are also other Sumerian/Dravidian words sharing similar sounding verb -ur. Sumerian
Uru (2) (= firewood.) has similar words in Tulu, Kannada (Uri- is to burn) and other Dravidian languages. Similarly, Sumerian Uru (3)(=to till or grow) has Urpini/Ulpini (Tulu), Ulu(=to till) in Kannada.
One of the numbers,"five" in Sumerian was Ia or i (=five).It is ain in Tulu and aidu in Kannada.
Sig(=sun burnt clay tiles) has analogous Sike or seke (=sunny sultriness) and Sigadi (=fire place/oven) in Tulu and Kannada.
There may be more such analogous words in Sumerian and Tulu/Kannada/Dravidian languages.
The analogy is cited here to suggest that some early Tulu,Kannada and other Dravidian tribes might have migrated from Sumerian region to India.