Kashi Mahajanapada
Kashi (Pali: Kāsī) was an ancient kingdom of India whose existence is attested during the Iron Age. The inhabitants of the Kashi were named the Kāsikas in Pāli and the Kāśeyas and Kāśikas in Sanskrit.The Kashi kingdom covered an area of 300 leagues.The northern border of Kasi which separated it from Kosala was the Sarpikā or Syandikā river,and the river Son formed its southern and eastern boundaries, separating it from Magadha in the east.[3][a]
The capital of Kashi was the city of Varanasi , which was also named Ketumatī, Surundhana, Sudassana, Brahmavaddhana, Pupphavatī, Ramma, and Molinī.