Family name خمسين (خمسين 
, Khamsin 
) , all over the world, is quite a rare cognomen. The cognomen خمسين is habitual in Oman, where it is quite a rare surname, Sudan, and Libya, where it is a rare surname. In absolute terms, it is the most numerous in Sudan, Tanzania, and Oman. Very seldom, خمسين is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| خمسين | Iraq, Egypt, Libya, Sudan, Saudi Arabia |
| Khamsin | Tanzania, Thailand, Oman, Malaysia, Saudi Arabia |
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محمد بن حسين أبو خمسين Saudi Arabian Islamic scholar, judge and teacher, SA (b. 1795) |
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| موسى أبو خمسين Saudi Arabian Islamic jurist and judge, SA (b. 1879) |
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| محمد باقر أبو خمسين Saudi Arabian Islamic scholar, writer and poet, SA (b. 1915) |
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| حسن أبو خمسين Saudi Arabian Islamic jurist and judge, SA (b. 1943) |
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