Family name Sainuddheen (Sainuddheen 
) , around the world, is a very rare surname. The cognomen Sainuddheen is characteristic of Southern Asia, particularly India, where it is an extremely rare surname. Much more frequently, Sainuddheen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sainuddheen | India |
Haji, and Koyathangal