Family name استاد (Ustad 
, Ustaz 
, استاد 
) , in the world, is a common cognomen. The cognomen استاد is characteristic of Norway, where it is quite a rare surname, United Arab Emirates, and Latvia. Measured by absolute frequency, this name is the most popular in India, Germany, and Nigeria. Very seldom, استاد is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ustad | Norway, Indonesia, India, United States, Saudi Arabia |
| Ustaz | Germany, Nigeria, Indonesia, India, Saudi Arabia |
| استاد | Algeria, Sudan, Morocco, Iraq, Saudi Arabia |
| Stade | Germany, Norway, Ethiopia, Canada, United States |