cave inscriptions, Bulgaria; V Sumerian script; VI Egyptian script; VII Indian script Fig.7. Identical letter in the script of ancient Bulgarians and other Neolithic scripts. Drawing by B. Shkodrov (Shopov et al., 2007). 4. Extent of Ancient Peoples and Migrations 4.1 Materials and methods In order to trace the ancient locations and migrations of the Kuti and the other ancient Indo-European branches we developed a new method for reconstruction of boundaries (or more precisely the maximal expansion) of ancient states by placing of the toponims and hydronames formed from their ethnic names on the map of the studied territories (Shopov et al, 2005a, Shopov, 2007). This study is based on processing of 6 900 000 toponims and hydronames from GIS and precise positioning of the established 4399 toponims and hydronames formed from the ethnic names of Bulgarians and their branches (Shopov et al, 2005a) on the maps of India, Pakistan, Bangladesh, Afganistan, Uzbekistan and Iran. Even now at modern migrations when one old name of a city or district appears at a new place it is always due to migration of population from the old place holding the same name. Therefore map of the North America is abundant with names of cities like London, Paris, Moskow, etc. because they had been founded by people coming from cities with the same names. Therefore historical science uses typical for one nation toponims as important indicators of its presence in a certain geographic region (Fol, 2001). Indeed ancient Bulgarians carried with them some characteristic toponims all the way from Balkans to Bangladesh and back (table 1, fig.8, 10). Written sources demonstrate that their migration along this path lasted at least 3100 years, but archaeological data suggest that it started far before the appearance of the Sumerian script and any historical records (Shopov et al, 2007) and may be initiated by the Black sea Flood. Particularly high degree of certainty has toponims and hydronames formed from the ethnic names of a nation, its branches and clans. They give important information about the structure of the state in ancient times even before appearance of the first script. Therefore we developed a new method for reconstruction of the tribal structure of ancient states by placing of the toponims and hydronames formed from their tribal names on the map (Shopov et al, 2005a, Shopov, 2007). 4.2 Results Bulgarians were not homogenous but consisted of well-defined branches or clans (Kutiguri (Kuti), Utiguri (Uti), Onoguri, Kuchi-Bulgar, Kupi-Bulgar and Kotrags), dynastic clans (Dulu-name originated from Persian word daulat meaning government). Each of these ethnonims produced hundreds of ........ .. ..... .. ....... ..... 2012 .......... .......... .. ..... toponims and hydronames across India, Pakistan, Bangladesh, Afghanistan, Uzbekistan and Iran which tend to cluster in relatively small parts of these countries. Regions with abundant Bulgarian toponims (fig 8, 10) in Iran, India, Pakistan are well known as territories inhabited by the Vedic tribes and contain reach archeological remains of their culture (Shopov et al, 2005a, Shopov, 2007). Figure 8. Map of the 8448 toponims and hydronames formed from the ethnic names of Bulgarians