The SS-Freiwilligen-Verband Niederlande was formed July 1941 when SS-Freiwilligen-Standarte Nordwest was split in two.
It was redesignated SS-Freiwilligen Legion Niederlande 24 September 1941.

Volunteers for SS-Freiwilligen-Verband Niederlande parading in July 1941
wss-freiw-verb-niederlande-vol
(Courtesy of Die Deutsche Wochenschau/Ivan)

Sources used

Kurt Mehner - Die Waffen-SS und Polizei 1939-1945

Reference material on this unit

Perry Pierik - From Leningrad to Berlin: Dutch Volunteers in the German Waffen-SS