The Iranian languages form a sub-branch of the Indo-Iranian sub-family, which is a branch of the family of Indo-European languages. Having descended from the Proto-Indo-Iranians, the Proto-Iranians separated from the Indo-Aryans around in the early 2nd millennium BC. The Proto-Iranians are traced to the Bactria-Margiana Archaeological Complex, a Bronze Age culture of Central Asia. The area between northern Afghanistan and the Aral Sea is hypothesized to have been the region where the Proto-Iranians first emerged, following the separation of Indo-Iranian tribes.[1]
The division of Proto-Iranian into an "Eastern" and a "Western" group is attested in the form of Avestan and Old Persian, the two oldest known Iranian languages.
^ Indische Alterthumskunde, Vol I, fn 6; also Vol II, p 129, Christian Lassen et al; Megasthenes and Arrian, p 180; See also: The Invasion of India by Alexander the Great as Described by Arrian, Q. Curtius, Diodoros, 1893, p 38, John Watson M'Crindle, Quintus Curtius Rufus, Marcus Junianus Justinus, Plutarch, Arrian, Diodorus; Etude Sur la Geog Grecque & c, pp 39-47, M. V. de Saint Martin; Imprints of Indian Thought and Culture abroad, p 124, Vivekananda Kendra Prakashan; Scottish Geographical Magazine, 1999, p 275, Royal Scottish Geographical Society); Sva, 1915, p 113, Christopher Molesworth Birdwood; Hobson-Jobson: A Glossary of Colloquial Anglo-Indian words and phrases, and of kindred terms, etymological..by Henry Yule, AD Burnell; The Numismatic Chronicle, 1893, p 100, Royal Numismatic Society (Great Britain); Awq, 1983, p 5, Giorgio Vercellin; Der Islam, 1960, p 58, Carl Heinrich Becker, Maymūn ibn al-Qāsim Tabarānī; Journal of Indian History: Golden Jubilee Volume, 1973, p 470, Trivandrum, India (City), University of Kerala. Dept. of History; Literary History of Ancient India in Relation to Its Racial and Linguistic Affiliations, 1970, p 17, Chandra Chakraberty; Stile der Portugiesischen lyrik im 20 jahrhundert, p 124, Winfried Kreutzen.; See: Works, 1865, p 164, Dr H. H. Wilson; The Earth and Its Inhabitants, 1891, p 83; Chants populaires des Afghans, 1880, p clxiv, James Darmesteter; Nouvelle geographie universelle v. 9, 1884, p 59, Elisée Reclus; Alexander the Great , 2004, p 318, Lewis Vance Cummings (Biography & Autobiography; Nouveau dictionnaire de géographie universelle contenant 1o La géographie physique ... 2o La .., 1879, Louis Rousselet, Louis Vivien de Saint-Martin; An Ethnic Interpretation of Pauranika Personages , 1971, p 34, Chandra Chakraberty; Revue internationale, 1803, p 803; Journal of Indian History: Golden Jubilee Volume, 1973, p 470, Trivandrum, India (City). University of Kerala. Dept. of History; Edinburgh University Publications, 1969, p 113, University of Edinburgh; Shi jie jian wen, 1930, p 68 by Shi jie zhi shi chu ban she. Cf also: Advanced History of Medieval India, 1983, p 31, Dr J. L. Mehta.
^ Historie du Bouddhisme Indien, p 110, E. Lamotte; East and West, 1950, pp 157-58, Istituto italiano per il Medio ed Estremo Oriente, Editor, Prof Giuseppe Tucci, Co-editors Prof Mario Bussagli, Prof Lionello Lanciotti; Panjab Past and Present, pp 9-10, Dr Buddha Parkash; Hindu Polity, A Contitutional History of India in Hindu Times, 1978, p 140, Dr K. P. Jayswal; Political History of Ancient India, 1996, p 133 fn 6, pp 216-20, (Also Commentary, op. cit., p 576, fn 22), Dr H. C. Raychaudhury, Dr B. N. Mukerjee; Raja Poros, 1990, Publication Buareau, Punjabi University, Patiala; History of Panjab, Vol I, (Editors): Dr Fauja Singh, Dr L. M. Josh, Publication Bureau, Panjabi University, Patiala; History of Poros, 1967, pp 12,39, Dr Buddha Prakash; Ancient Kamboja, People and country, 1981, pp 271-72, 278, Dr J. L. Kamboj; These Kamboj People, 1979, pp 119, 192; Kambojas, Through the Ages, 2005, pp 129, 218-19, S Kirpal Singh etc. Dr J. W. McCrindle says that the modern Afghanistan -- the Kaofu (Kambu) of Hiun Tsang was ancient Kamboja, and the name Afghan evidently derives from the Ashavakan, the Assakenoi of Arrian (Alexandra's Invasion of India, p 38; Megasthenes and Arrian, p 180, J. McCrindle). Sir Thomas H. Holdich, in the his classic book, (The Gates of India, p 102-03), writes that the Aspasians (Aspasios) represent the modern Kafirs. But the modern Kafirs, especially the Siah-Posh Kafirs (Kamoz/Camoje, Kamtoz) etc are considered to be modern representatives of the ancient Kambojas. Other noted scholars supporting this view are Dr Romilla Thapar, Dr R. C. Majumdar etc.
Literature
H. Bailey, "ARYA: Philology of ethnic epithet of Iranian people", in Encyclopaedia Iranica, v, pp. 681-683, Online-Edition, Link
A. Shapur Shahbazi, "Iraj: the eponymous hero of the Iranians in their traditional history" in Encyclopaedia Iranica, Online-Edition, Link