This is the 7392nd most frequent Polish word.
klaudia
"Klaudia" is a Polish feminine given name equivalent to "Claudia" in English.
Here, "Klaudia" is a proper noun, serving as the subject of the sentence.
Klaudia uczy się języka angielskiego.
Klaudia is learning English.
In this sentence, "Klaudii" is the genitive form of the proper noun "Klaudia," used to indicate possession.
W domu Klaudii panuje miła atmosfera.
There is a nice atmosphere in Klaudia's house.
Here, "Klaudię" is the accusative form of the proper noun "Klaudia," which is used as the direct object of the verb "spotkałem."