Kassites

"But as a whole they were not Aryans. Though they adopted the Babylonian language and culture, the local scribes have recorded the Kassite names for god, star, heaven, wind, man, foot, etc. ; not one of these is in the least Indo-European. Moreover, the majority of the personal names of the period ... suggest rather a kinship between the Kassites and the Asianic folk to the north-west. Yet in the names of their kings occur elements recalling Indo-Iranian deities — SuriaS (Sun-god cf . Sans. Surya) IndaS (cf. Sans. Indra)y MaruttaS (cf. Sans. Mantiah, storm-gods) and -bugaS (cf. Iran, baga, god). Moreover, these Kassites introduced the use of the horse for drawing chariots into the Ancient East and its later Babylonian name sitsu seems to be derived from the Indo- Iranian form ^asm (Sans. aim). It is then highly probable that the Kassite invasion was due to the pressure of Aryan tribes on the highlands of Iran, and that its leaders were actually Aryan princes."