This is the 7413th most frequent Polish word.
kolaković
"Kołaković" is not a standard Polish word; it appears to be a surname.
In this sentence, 'Kolaković' is used as a proper noun representing a surname, indicating a person's identity.
Kolaković to nazwisko znanej osoby z Serbii.
Kolaković is the surname of a famous person from Serbia.
Here, 'Kolaković' again acts as a surname, identifying an individual in a formal context.
Czy znasz pana Kolakovića, który przeprowadzał wykład na konferencji?
Do you know Mr. Kolaković, who gave a lecture at the conference?
In this sentence, 'Kolaković' is used informally to refer to a person known to the speaker by their surname.