This is the 7365th most frequent Polish word.
kaźmierczak
"Kaźmierczak" is a Polish surname and does not have a standalone definition in English.
Here, 'Kaźmierczak' is used as a proper noun, referring to a person's surname.
Pan Kaźmierczak napisał świetną książkę.
Mr. Kaźmierczak wrote a great book.
Here, 'Kaźmierczakowie' refers to a pluralized form of the surname, used to denote the family named Kaźmierczak.
Kaźmierczakowie spędzają wakacje nad morzem.
The Kaźmierczak family is spending the holidays by the sea.
In this sentence, 'Kaźmierczaku' is the locative case of the surname used after the preposition 'o' ('about').