Cognomen กลุ่ม (Klum 
, กลุ่ม, Clul) , around the world, is a rare family name. The cognomen กลุ่ม is habitual in Sweden, where it is a rare surname, Germany, and Bulgaria. Measured by absolute frequency, the name is most common in Germany, the United States, and Sweden. Much less frequently, กลุ่ม is the forename as well as the last name.