Cognomen Jamalluddin (Jamalluddin 
) , in all the world, is a rare last name. The surname Jamalluddin is habitual in Malaysia, where it is quite a rare surname, Sri Lanka, where it is a rare surname, and Singapore. In absolute terms, it is the most numerous in Malaysia, Indonesia, and Sri Lanka. Much less frequently, Jamalluddin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jamalluddin | Singapore, India, Indonesia, Sri Lanka, Malaysia |