This is the 6483rd most frequent Turkish word.
aliyev
"Aliyev" is a Turkish surname of Azerbaijani origin, often meaning "son of Ali."
In this sentence, 'Aliyev' is used as a proper noun, representing a person's name, and indicates possession.
Aliyev'in kitabını okudum.
I read Aliyev's book.
Here, 'Aliyev' is again a proper noun and indicates the subject of the sentence who has a defined role as an author.
Aliyev çok tanınmış bir yazardır.
Aliyev is a very well-known author.
In this usage, 'Aliyev' serves as the subject of the sentence, referring to a person carrying out an action.