This is the 7411th most frequent Polish word.
kocyłowska
"Kocyłowska" is not a standalone word in Polish; it appears to be a proper noun, likely a surname.
The word "Kocyłowska" is used here as a proper noun, denoting the name of a street.
Mieszkam na ulicy Kocyłowskiej.
I live on Kocyłowska Street.
The word "Kocyłowskiej" is used here as a genitive case of a family surname, indicating possession or relation.
Czy znasz historię rodziny Kocyłowskiej?
Do you know the history of the Kocyłowski family?
Here, "kocyłowskiej" functions as an adjective derived from the name, describing an area related to "Kocyłowska" or "Kocyłowski."