Family name ถ่ำ (Tham 
, ถ่ำ) , around the globe, is a common last name. The last name ถ่ำ is habitual in Singapore, where it is a common surname, Malaysia, where it is quite a common surname, and Macao (explore the name in all countries). In absolute terms, it is the most numerous in South-eastern Asia, particularly Malaysia, Singapore, and Vietnam. Also, ถ่ำ is the forename as well as the last name.