Last name Jammaz (Jammaz 
) , in all the world, is quite a rare cognomen. The cognomen Jammaz is habitual in Western Asia, particularly Lebanon, where it is quite a rare surname, Saudi Arabia, and Bahrain. Not in comparison with a country's population, it most frequently occurs in Western Asia, particularly Saudi Arabia, Lebanon, and Oman. Much less frequently, Jammaz is the forename as well as the last name.
| jammaz ibn shihah emir of Medina (d. 1304) (b. 1250) |
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| jammaz ibn hasan 13th-century Emir of Mecca (r. 1253–1254) |
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| ibn jammaz qari |
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