Where does “Hellevoetsluis” come from?

Hellevoetsluis (Dutch) comes from Dutch sluis, from English sluice, from Middle English sluse, from Middle English scluse, from Old French escluse, from Latin exclūsa, from Latin exclūsus, from Latin exclūdō — close.

Ancestry of “Hellevoetsluis”, step by step

Hellevoetsluis traces back through 3 separate lines of ancestry.

via Dutch sluis

Step	Language	Word	Meaning
1	Dutch	sluis	sluice, lock
2	English	sluice	An artificial passage for water, fitted with a...
3	Middle English	sluse	—
4	Middle English	scluse	sluice
5	Old French	escluse	sluice
6	Latin	exclūsa	—
7	Latin	exclūsus	excluded
8	Latin	exclūdō	to shut out; cut off, remove, separate from something
9	Latin	claudere	present active infinitive of claudō;...
10	Latin	claudo	I shut, close, lock; I imprison, confine; I...
11	Proto-Italic	klaudō	close

via Dutch voet

Step	Language	Word	Meaning
1	Dutch	voet	foot; Dutch foot; imperial foot
2	Middle Dutch	voet	foot; paw; foot, bottom part, base
3	Old Dutch	fuot	foot
4	Proto-West Germanic	fōt	foot
5	Proto-Germanic	fōts	foot
6	Proto-Indo-European	pṓds	foot
7	Proto-Indo-European	póds	foot
8	Proto-Indo-European	ped-	to walk, to step; to stumble, to fall

via Dutch helle

Step	Language	Word	Meaning
1	Dutch	helle

Every word from Proto-Italic klaudō →Every word from Latin claudo →Every word from Latin claudere →