This is the 1210th most frequent Dutch word.
martijn
"Martijn" is a Dutch male given name and does not have a separate definition beyond being a proper name.
In this sentence, 'Martijn' is used as a proper noun, referring to a person named Martijn.
Martijn gaat naar de markt.
Martijn is going to the market.
Here, 'Martijn' serves as a possessive proper noun indicating ownership ('van Martijn' translates to 'Martijn's').
Ik zag de auto van Martijn.
I saw Martijn's car.
In this usage, 'Martijn' takes a possessive form ('Martijns') to indicate that an idea belongs to Martijn.