Cognomen Mohamad Najmuddin (Mohamad Najmuddin 
) , around the world, is an extremely rare family name. Much more prevalently, Mohamad Najmuddin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mohamad Najmuddin | Malaysia |
Yusoff, Mahmood, Zakaria, Abdullah, and Muhamad Sidid