Dutch word peterselie comes from Ancient Greek πετροσέλινον, Ancient Greek πετροσέλῑνον, and later Latin petroselinum (Rock parsley.)

Detailed word origin of peterselie

Dictionary entry	Language	Definition
πετροσέλινον	Ancient Greek (grc)
πετροσέλῑνον	Ancient Greek (grc)
petroselinum	Latin (lat)	Rock parsley.
petersille	Middle Dutch (dum)
peterselie	Dutch (nld)	(botany) parsley. Some resembling plants.