Marthijn is not a popular first name. It is more often used as a boy (male) name.
First names and their meaning - Page 11532
Martiene
Martiene is not a popular first name. It is more often used as a girl (female) name.
Martijke
Martijke is not a popular first name. It is more often used as a girl (female) name.
Martiko
Origin: Basque. 
Martiko is not a popular first name. It is more often used as a boy (male) name. 
Martim
Martim is not a popular first name. It is more often used as a boy (male) name.
Martín
Origin: Basque. 
The name Martin means "Warrior" in Latin, it comes from the god Mars. Other sources point out that it means […] 
Martiñe
Origin: Basque. 
Martine is a female given name and a surname. 
Martinella
Martinella is not a popular first name. It is more often used as a girl (female) name.
Martinian
Martinian is not a popular first name. It is more often used as a boy (male) name.
Martinie
Martinie is not a popular first name.