Surname ม้อย (Moi 
, ม้อย) , throughout the world, is a common family name. The last name ม้อย is characteristic of Malaysia, where it is a common surname, Brunei, where it is quite a common surname, and Papua New Guinea (explore the name in all countries). Measured by absolute frequency, it is commonest in Malaysia, Indonesia, and Kenya. Very seldom, ม้อย is the forename as well as the last name.