This is the 1436th most frequent Dutch word.
gillis
The word "gillis" does not have a standard definition in Dutch; it may be a proper name or colloquial/slang term.
In this sentence, 'gillis' is a proper noun, used as a person's surname.
Ik las over een beroemde schilder, Jan Gillis.
I read about a famous painter, Jan Gillis.
Here, 'Gillis' is part of the name for a location, indicating its historical or cultural origin.
De naam van de straat is Gillis van Ledenberchstraat.
The name of the street is Gillis van Ledenberchstraat.
In this context, 'Gillis' could be the name of a music band, identifying them as performers.