$17.00
Ghost,
"Pakistan" means "land of the pure" in Urdu, from "pak", pure, and "stan", land. These are both words of Persian origin. This name was picked by Indian Muslims early, well before independence from Britain became a reality. The implication was that they wanted a nation of pure Islamic culture.
The acronym you mentioned came later, when they were negotiating what territory they would get in the final partition settlement. It was used a bit like the American slogan "Fifty-four forty (54°40') or fight" was used in pushing the border of the Oregon territory as far north as possible when negotiating with Britain and Canada in the 1840s.
Here is the acronym:
P: Panjab (pronounced pun-JOB), the land of the 5 rivers, from "paanch", 5, and "ab", water. Mainly Sikh and Hindu East Panjab went to India. Mostly Muslim West Panjab went to Pakistan, and became its largest and most important province. This is where the most deadly riots, deportations, and mass rapes in the Subcontinent occurred during Partition.
A: Afghania, along the border with Afghanistan, became the Northwest Territory, including the eastern end of the Khyber Pass.
K: Kashmir, a kingdom which went to India, but 3 parts of which were later seized by Pakistan and China through sneak attacks.
I: Indus, the valley of the Indus River, from the Latinized form of Hind, the Persian word for northern India. This river was the border between Persia and India in ancient times.
S: Sindh, home of the Sindhi people.
TAN: BaluchisTAN, from "Baluchi" and "stan", land of the Baluchi people.