Cognomen צאדק (Sadiq 
, צאדק 
) , in all the world, is a widespread family name. The cognomen צאדק is habitual in Pakistan, where it is a common surname, United Arab Emirates, where it is quite a common surname, and Nigeria (explore the name in all countries). Measured by absolute frequency, it is commonest in Pakistan, Nigeria, and India. Likewise, צאדק is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sadiq | Pakistan, India, Ethiopia, Nigeria, Saudi Arabia |
| צאדק | Israel |