Surname Udein (Udein 
) , all over the world, is a very rare last name. The cognomen Udein is habitual in Saudi Arabia, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and India. Much less frequently, Udein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Udein | Canada, United Kingdom, United States, Saudi Arabia, India |