Cognomen Chalapan (Chalapan 
, ชลาพรรณ ) , all around the world, is a rare surname. The cognomen Chalapan is habitual in Papua New Guinea, where it is quite a rare surname, Belarus, where it is a rare surname, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Papua New Guinea, Belarus, and India. Also, Chalapan is the forename as well as the last name.