I guess you lost your mind when you figured out that all of India's borders are named after white British men like Henry MacMahon.
There was no such thing as India before the colonialists came. Even the name India is taken from a river in another country (Pakistan) because that was a part of the British Raj, not the Republic of India.
Pakistan's Indus River is what the British used when they came up with the idea of India. Hinduism is also named after this same river. So are West Indians (black people in the Carribean) who were also named by the British after this same river.