Surname ضیایی (Ziai 
, ضیایی 
) , throughout the world, is quite a rare cognomen. The family name ضیایی is habitual in Afghanistan, where it is quite a rare surname, Luxembourg, and Estonia, where it is a rare surname. Measured by absolute frequency, the name is most common in Afghanistan, Iran, and Malaysia. Much less frequently, ضیایی is the forename as well as the last name.
| ضیایی سبزواری Iranian poet, IR (b. 1890) |
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مهرداد ضیایی Iranian actor (born 1968), IR (b. 1968) |
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سید مهرداد ضیایی Iranian actor (born 1969), IR (b. 1969) |
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حسینعلی ضیایی IR |
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| حسین ضیایی Muslim philosopher, IR (b. 1944) |
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| محمدباقر ضیایی Iranian activist, IR (b. 1953) |
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| محمدرفیع ضیایی IR (b. 1948) |
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| محمدحسین ضیایی football manager, IR |
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| پیرمقل ضیایی AF |
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