This is the 9625th most frequent Polish word.
wyszyńskiego
"Wyszyńskiego" is a possessive or locative form of "Wyszyński," a Polish surname, often referring to something related to or named after a person with that name.
Here, 'Wyszyńskiego' is used locatively to indicate the name of the street, likely named after a person with the surname Wyszyński.
Katedra znajduje się na ulicy Wyszyńskiego.
The cathedral is located on Wyszyński Street.
In this sentence, 'Wyszyńskiego' is in the genitive case and refers to the author of the book, Cardinal Wyszyński.
Czytałem książkę autorstwa Kardynała Wyszyńskiego.
I read a book written by Cardinal Wyszyński.
Here, 'Wyszyńskiego' is in the genitive case used with the preposition 'o' to discuss the impact of Cardinal Wyszyński.