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• Update: Labeled Asandivat and Mithila, as per the identifications with modern Assandh and Janakpur, respectively, in H.C. Raychaudhuri (1972) (and in the relevant Wikipedia articles)
• September 2015 Update: Expanded to reflect data on page 4 of Witzel (1997)

Sources used in May 2020 update: mainly Witzel (1990), "Notes on Vedic Dialects" [1], p.42; also with reference to Samuel (2010), The Origins of yoga and Tantra, and Bronkhorst (2007), Greater Magadha. List of other source materials:

• Schwartzberg, J. E. (1992) Historical Atlas of South Asia, University of Oxford Press OCLC: 929640075.
• Staal, F. (2008) Discovering the Vedas: Origins, Mantras, Rituals, Insights, New York: Penguin, p. 347 ISBN: 9780143099864.
• Witzel, M. (1987) "On the localisation of Vedic texts and schools (Materials on Vedic Śākhās, 7)" in Pollet, G., ed. India and the Ancient world. History, Trade and Culture before A.D. 650, Jubilee Volume, Leuven: P.H.L. Eggermont OCLC: 1089172707.
• Witzel, M. (1999) "Aryan and non-Aryan Names in Vedic India. Data for the linguistic situation, c. 1900- 500 B.C." in J. Bronkhorst; M. Deshpande, ed. Aryans and Non-Non-Aryans, Evidence, Interpretation and Ideology, Harvard Oriental Series, Opera Minora 3, Cambridge OCLC: 671955255.
• Raychaudhuri, Hemchandra (1972) Political History of Ancient India: From the Accession of Parikshit to the Extinction of the Gupta Dynasty, Kolkata: University of Calcutta OCLC: 247834106.
• Witzel, Michael (1997) "Early Sanskritization Origins and Development of the Kuru State The State, the Law, and Administration in Classical India" in The State, the Law, and Administration in Classical India (PDF), Schriften des Historischen Kollegs, 30, Berlin: Oldenbourg OCLC: 7354294539.