Family name น้ำอ้อย (Namoi 
, Nam-Oi , น้ำอ้อย) , all around the world, is a very rare surname. The cognomen น้ำอ้อย is characteristic of Israel, where it is a rare surname, Nigeria, where it is an extremely rare surname, and Philippines. Not in comparison with a country's population, it is the most numerous in Nigeria, Israel, and India. More prevalently, น้ำอ้อย is the forename as well as the last name.