This is the 328th most frequent Hungarian word.
katalin
"Katalin" is a Hungarian female given name, equivalent to "Katherine" in English.
Here, "katalin" is used as a proper noun, specifically a given name.
Katalin nagyon szép név.
Katalin is a very beautiful name.
Here, "katalin" refers to "Katalin's name day," a cultural celebration in Hungary associated with individuals named Katalin.
Az iskola az idén Katalin napja alkalmából szervezett ünnepséget.
This year, the school organized a celebration for Katalin's name day.
In this context, "katalin" is part of a compound noun (Katalin Cross), referring to an entity named after the name Katalin.