Family name ถ้วย (Cup 
, Chalice 
, Thuai 
) , globally, is quite a rare last name. The family name ถ้วย is habitual in Kosovo, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Slovakia. Measured by absolute frequency, the name is most common in Taiwan, Indonesia, and India. Likewise, ถ้วย is the forename as well as the last name.