This is the 5490th most frequent Dutch word.
lukasz
"Lukasz" is not a Dutch word; it is a Polish male given name.
Here, 'Lukasz' is used as a proper noun referring to a person's name.
Lukasz is aan het studeren voor zijn examen.
Lukasz is studying for his exam.
In this sentence, 'Lukasz' again functions as a proper noun, indicating the individual who is met by the students.
De studenten waren blij om Lukasz te ontmoeten.
The students were happy to meet Lukasz.
Here, 'Lukasz' is used possessively to indicate ownership of the project.