Surname حدادي سي سخت (حدادي سي سخت 
) , throughout the world, is a very rare cognomen. The family name حدادي سي سخت is characteristic of Southern Asia, particularly Iran, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| حدادي سي سخت | Iran |
سيدقدرت اله, and سيدمصطفي