The top 5 most common last names in Turkey with meanings are as follows:

Yılmaz: dauntless, never gives up
Kaya: rock
Demir: iron
Şahin: falcon
Çelik: steel


Other turkish last names:

Asker: soldier
Aslan: lion
Gül: rose
Kaplan: tiger
Korkmaz: not afraid, will not get scared
Polat: force, power
Sevim: loveable
Yiğit: brave, young man; dashing young fellow, young buck, young blood, courageous, stouthearted