300s BC deaths

Nearchus or Nearchos (; – 300 BC) was one of the Greek officers, a navarch, in the army of Alexander the Great. He is known for his celebrated expeditionary voyage starting from the Indus River, through the Persian Gulf and ending at the mouth of the Tigris River following the Indian campaign of Alexander the Great, in 326–324 BC.

ancient Greek philosopher

Callippus (; ; c. 370 BC – c. 300 BC) was a Greek astronomer and mathematician.