You know Bandar or Monkey in India come from the root word, Vana Dhara - forest dweller.
Vana also means distant land, so vanadhara or Vandhar means a place to go to distant land or place where peple from distant land come. The word "Bandar" or Port is a corruption of this sanskrit word.
Bandar in Persian means town or Port. It means "port" in India too e.g. Porbandar (place where Gandhi was born), Bandra (suburb in Mumbai), Apollo Bunder, Tank Bund (hyderabad) etc.
Even today ALL ports in India is called Bandar.
The capital city of Brunei is called "Bandar Seri Begawan" or " City of the god" (Sri Bhagwan) .