Sama Veda
The Vamsa Brahmana of the Sama Veda refers to Madrakara Shaungayani as the teacher of Aupamanyava Kamboja. Sage Shangayani Madrakara, as his name itself shows, and as the scholars have rightly pointed out, belonged to the Madra people.
Prof Jean Przylusky has shown that Bahlika (Balkh) was an Iranian settlement of the Madras who were known as Bahlika-Uttaramadras i.e. the northern Madras, living in Bahlika or Bactria country. These Bahlika Uttara Madras are the Uttara Madras of the Aitareya Brahamana.
This connection between the Uttara Madras and the Kambojas is said to be but natural, as they were close neighbors in the north-west.
The Kambojas as neighbors of the Uttara Madras here obviously refers to the trans-Himalayan branch of the Kambojas who became known as Parama-Kambojas in epic times. Both these nations belonged to Central Asia.
Read more about this topic: Central Asians In Ancient Indian Literature, Central Asian People in Indian Classical Literature