This is the 6707th most frequent Turkish word.
balıkesirli
A person from Balıkesir.
Here, 'Balıkesirli' is used as an adjective describing someone's origin from Balıkesir.
Balıkesirli arkadaşım Tülin geçen hafta İstanbul'u ziyaret etti.
My friend from Balıkesir, Tülin, visited Istanbul last week.
In this context, 'Balıkesirli' again specifies the origin but as a characteristic of multiple students, highlighting their collective description.
Sınıfımızdaki Balıkesirli öğrenciler çok başarılı.
The students from Balıkesir in our class are very successful.
Here, 'Balıkesirli' is used as a noun to express identity and origin, referring to the speaker themselves being from Balıkesir.