Family name ไว้อาลัย (Moeurn 
, ไว้อาลัย, Mournampray ) , globally, is a very rare surname. The cognomen ไว้อาลัย is characteristic of Cambodia, where it is a rare surname, Belgium, and Thailand, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Cambodia, Thailand, and the United States. Likewise, ไว้อาลัย is the forename as well as the last name.