Cognomen ลำต้น (Lamton 
, Trunky 
, ลำต้น) , all over the world, is a rare family name. The family name ลำต้น is habitual in Thailand, where it is a rare surname, Bangladesh, where it is a very rare surname, and Israel. Not in comparison with a country's population, the name is most common in Bangladesh, Thailand, and the United States. Very seldom, ลำต้น is the forename as well as the last name.