This is the 6868th most frequent Polish word.
félix
The word "félix" is not Polish; it appears to be a name or term from another language.
Here, 'Félix' is used as a given name, identifying the subject of the sentence.
Félix uwielbia grać na gitarze.
Félix loves to play the guitar.
In this sentence, 'Félix' functions as a proper noun and refers to the name itself under consideration.
Muszę znaleźć znaczenie imienia Félix.
I need to find the meaning of the name Félix.
Here 'Félix' is used as a place name, indicating the destination.