This is the 7863rd most frequent Polish word.
mieszkowski
"Mieszkowski" is a Polish surname and does not have a standalone definition in English.
In this case, 'Mieszkowski' is used as a proper noun, likely indicating a person's surname.
Mieszkowski jest autorem wielu książek na temat historii.
Mieszkowski is the author of many books on history.
Here, 'Mieszkowskich' is a plural possessive form of the surname 'Mieszkowski', denoting the family collectively.
Rodzina Mieszkowskich zamieszkała w kraju w XIX wieku.
The Mieszkowski family settled in the country in the 19th century.
In this example, 'Mieszkowski' serves as an identifier for an individual male person with that surname.