Cognomen قستي (قستي 
) , across the world, is a very rare last name. The last name قستي is habitual in Western Asia, particularly Saudi Arabia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| قستي | Saudi Arabia |
| عبد الغني قستي Saudi Arabian journalist and poet, SA (b. 1928) |
|
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| طلال حسين قستي Saudi Arabian journalist, SA (b. 1952) |
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