This is the 8076th most frequent Polish word.
nikola
"Nikola" is a Polish given name, typically used for girls.
Here, 'Nikola' is used as a proper noun referring to a person's name.
Nikola czyta książkę.
Nikola is reading a book.
In this sentence, 'Nikola' is still a proper noun, used in the context of someone's given name.
To dziecko ma na imię Nikola.
This child's name is Nikola.
Here, the word 'Nikoli' is a genitive form of the proper noun 'Nikola'.