Family name Malachai (Malachai 
) , all around the world, is a very rare last name. The cognomen Malachai is habitual in Nigeria, where it is a very rare surname, Israel, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Nigeria, Thailand, and the United States. Likewise, Malachai is the forename as well as the last name.