Surname مستعد (مستعد 
) , in all the world, is a rare family name. The cognomen مستعد is habitual in Iran, where it is a rare surname, and Morocco.
| مصطفى مستعد moroccan actor, MA (b. 1945) |
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| امیرحسین مستعد Iranian musician from the members of Arian group, IR |
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