Cognomen ปล้องอ้อย (Plongoi 
, ปล้องอ้อย, Plong Uan ) , around the world, is a very rare surname. The last name ปล้องอ้อย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ปล้องอ้อย is the forename as well as the last name.