This is the 8006th most frequent Polish word.
napiórkowski
"Napiórkowski" is a Polish surname and does not have a standalone meaning in English.
In this sentence, 'Napiórkowski' is used as a proper noun to denote a last name.
Napiórkowski to moje nazwisko.
Napiórkowski is my last name.
Here, 'Napiórkowskiego' is the accusative form of the proper noun 'Napiórkowski', following Polish grammar rules.
Znałam kiedyś pana Napiórkowskiego.
I used to know Mr. Napiórkowski.
In this sentence, 'Napiórkowski' is in the vocative case, used to directly address someone.