(Friesland) First attested as op dae campen in 1433. Borrowed from West FrisianDe Kampen, derived from the plural form of Old Frisiankamp(“enclosed piece of land”).
(Groningen) Derived from the plural form of kamp(“enclosed piece of land”).
(Noord-Holland) Attested as De Ooster Kampen, De Wester Kampen in 1680. Derived from the plural form of kamp(“enclosed piece of land”).