Cognomen 則 (Zak 
, Chet 
, Chak , along with others...) , in all the world, is a common surname. The family name 則 is habitual in Slovakia, where it is a common surname, Macao, where it is quite a common surname, and Czechia (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Malaysia, Poland, and Slovakia. Also, 則 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Zak, Chek, Chak | Taiwan, Poland, United States, India, Malaysia |
| Chet | Taiwan, United States, India, Malaysia, Algeria |
| Zé | Portugal, Morocco, United States, United Kingdom, Algeria |
| Tsek | Greece, South Africa, United States, Netherlands, Mongolia |
| 則 | China |