Family name กับ (Wirth 
, Verus 
, กับ 
) , around the world, is a common last name. The last name กับ is characteristic of Liechtenstein, where it is quite a common surname, Malta, and Switzerland (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Switzerland. Very seldom, กับ is the forename as well as the last name.