Actually... the country was named Pakistan after the Hindustani (Urdu)/Persian word پاك (pak), meaning 'pure'. This was backronymed by Rahamat Ali, a prominent Pakistani nationalist, to contain the NW provinces of Punjab, Afghania, Kashmir, Sindh and Balochistan. Azad Kashmir didn't really exist until the Indo-pak war, and the entirety of Jammu is in india. Saying that the region consisted of 6 warring mountain tribes along those lines is inaccurate too. While there were a few of them in the northwestern regions/modern day FATA and neighbouring territories, they were ignored by the Britons/used to divide the tribes territory, like with the Pashtuns and the Durand Line. Most of the land wasn't all that different from (the rest of) India, other than being Muslim majority instead of Hindu majority. On a side note, Jinnah actually disliked the name, because he felt that 'pak' would mean that there was necessarily a notion of 'napak' (impure), but was later forced to accept it.