This is the 6923rd most frequent Polish word.
gieysztor
"Gieysztor" is a Polish surname and does not have a specific definition in English beyond being a last name.
In this sentence, 'Gieysztor' is used as a proper noun, referring to a notable individual.
Gieysztor był wybitnym historykiem i uczonym.
Gieysztor was an outstanding historian and scholar.
Here, 'Gieysztora' is in a grammatical form indicating possession and still refers to the same individual as before.
Biblioteka mieści wiele książek o pracy Gieysztora.
The library holds many books about Gieysztor's work.
'Gieysztora' in this context continues to refer to the same historical figure, emphasizing his contributions to the field of history.