This is the 5177th most frequent Dutch word.
jeroen
"Jeroen" is a Dutch male given name; it does not have a standalone meaning.
Here, 'Jeroen' is used as a proper noun to identify a person by name.
Jeroen is mijn beste vriend.
Jeroen is my best friend.
In this sentence, 'Jeroen' is again a proper noun referring to a specific individual.
Ik zag Jeroen gisteren bij het park.
I saw Jeroen yesterday at the park.
In this usage, 'Jeroen' is used in possessive form, indicating ownership of the ideas.