This is the 7275th most frequent Polish word.
jędrzeja
"Jędrzeja" is the genitive or accusative singular form of the Polish name "Jędrzej," equivalent to "Andrew" in English.
Here, 'Jędrzeja' is the genitive form of the name 'Jędrzej' used after certain verbs, such as 'spotkałem' (I met), which requires this specific case in Polish.
Jędrzeja spotkałem wczoraj na rynku.
I met Jędrzej yesterday at the market.
Here, 'Jędrzeja' is in the genitive case indicating possession, aligning with the noun phrase 'ulubiona książka' (favorite book).
To jest ulubiona książka Jędrzeja.
This is Jędrzej's favorite book.
Here, 'jędrzeja' is used as a descriptive term or instance in a general context (not a proper noun), describing the subject of study in an academic setting.