This is the 3576th most frequent Polish word.
cezary
"Cezary" is a Polish given name, equivalent to "Caesar" in English.
In this sentence, 'Cezary' is used as a proper noun referring to someone's name.
Cezary był bardzo szczęśliwy, gdy otrzymał list.
Cezary was very happy when he received the letter.
Here, 'Cezary' is used as a possessive form 'Cezary'ego', indicating ownership of the books.
Podczas zajęć, nauczyciel przywołał przykłady z książek Cezary'ego.
During the class, the teacher referred to examples from Cezary's books.
In this case, 'cezary' is used metaphorically as a common noun to represent a tool or object.