Complex sentence: The airport is named after the 17th-century Maratha emperor, Chhatrapati Shivaji and its IATA airport code-- "BOM"--is derived from Bombay, Mumbai's former name.
Split into simpler sentences: The airport is named after the 17th-century Maratha emperor, Chhatrapati Shivaji. CSIA's IATA airport code-- "BOM"--is derived from Bombay, Mumbai's former name.