Family name صيام (Syam 
, Siam , Siyam , among others...) , throughout the world, is a widespread cognomen. The cognomen صيام is characteristic of Palestinian Territory, where it is a common surname, Jordan, where it is quite a common surname, and Egypt (explore the name in all countries). In absolute terms, this name is the most popular in Indonesia, Egypt, and Bangladesh. Also, صيام is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Syam, Siam, Siyam | Indonesia, Bangladesh, Egypt, Malaysia, India |
| صيام | Iraq, Sudan, Jordan, Palestinian Territory, Egypt |
| Seyam | Saudi Arabia, Bangladesh, Egypt, Malaysia, India |
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أحمد صيام Egyptian actor, EG (b. 1953) |
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وليد علي صيام Palestinian diplomat, ambassador, PS (b. 1955) |
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| محمد صيام PS (b. 1910) |
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صيام بن يوسف Tunisian association football player, FR (b. 1989) |
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| سعيد صيام Palestinian politician (1959-2009), PS (b. 1959) |
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| رضا صيام German-Egyptian Islamic militant, EG (b. 1959) |
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| أمل صيام Palestinian politician, PS (b. 1962) |
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| إسلام صيام association football player, EG (b. 1985) |
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| تامر صيام Palestinian association football player, PS (b. 1992) |
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