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 |
|---|---|
| Chak, Chek, Zak | Malaysia, Poland, Taiwan, United States, India |
| Chet | Algeria, Malaysia, Taiwan, United States, India |
| Zé | Portugal, United Kingdom, Morocco, Algeria, United States |
| Tsek | South Africa, United States, Greece, Mongolia, Netherlands |
| 則 | China |