Family name ท่าน (Pax 
, Sir 
, Sird 
) , in the world, is a common cognomen. The last name ท่าน is habitual in Bhutan, where it is quite a common surname, Maldives, and Taiwan, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Bangladesh, China, and Nepal. Likewise, ท่าน is the forename as well as the last name.