All over the world, صدرالدین (Sadruddin 
, Sadriddin 
, صدرالدین 
) is quite a rare male forename. The first name صدرالدین is habitual in Afghanistan, where it is quite a rare male name, Qatar, where it is a rare male name, and Saudi Arabia. Measured by absolute frequency, it is the most numerous in India, Afghanistan, and Saudi Arabia. Much less frequently, صدرالدین is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sadruddin | Afghanistan, Bangladesh, India, Pakistan, Saudi Arabia |
| Sadriddin | India, Tajikistan, Canada, United States, Uzbekistan |
| صدرالدین | Afghanistan, Iran, Turkey |
| صدرالدین جوینی IR (b. 1246) |
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| صدرالدین موسی leader of the Safaviya order, IR (b. 1305) |
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| صدرالدین دشتکی Iranian philosopher, IR (b. 1425) |
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صدرالدین ہاشوانی Pakistani businessman, PK (b. 1940) |
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صدرالدین حجازی Iranian actor, IR (b. 1948) |
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| صدرالدین الهی Iranian professor, IR (b. 1934) |
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| صدرالدین احمد خالد زنجانی IR |
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