This is the 680th most frequent Romanian word.
cătălin
"Cătălin" is a Romanian male given name, equivalent to "Catherine" or derived from it, meaning "pure."
In this context, 'Cătălin' is used as a proper noun, representing a person's name.
Cătălin merge la școală.
Cătălin is going to school.
Here, 'Cătălin' again represents a person's name and acts as the indirect object of the sentence.
I-am oferit un cadou lui Cătălin.
I gave a gift to Cătălin.
In this sentence, 'Cătălin' is the subject of the sentence, indicating the person being described.