Family name Yamaç (Yamaç 
) , around the world, is a common cognomen. The cognomen Yamaç is habitual in Turkey, where it is quite a common surname, and Belgium, where it is a very rare surname. Very seldom, Yamaç is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yamaç | Turkey, United States, Belgium, Germany |
| haluk yamaç Turkish fencer, TR (b. 1957) |
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| kadri yamaç Turkish physician, TR (b. 1958) |
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| muharrem korhan yamaç Disabled sport shooter, TR (b. 1972) |
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| yamaç tekintaş researcher |
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| yamaç telli Turkish pianist, TR (b. 1988) |
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| yamaç okur |
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