From what I’ve heard, the conventional wisdom is that human migrated out of Africa and settled India, but there have also been other settler from central Asia who were lighter in tone. These settlers, the Aryans, invaded India, the Middle East, as well as Europe, and some remnants of their language can be seen in words like ma, mom, which are similar across many languages. They also brought their religion which mixed with pre existing ones to form modern Hinduism.