The story
- Proto-Germanic · inherited from*knuppô
- Middle Dutch · derived fromknoppe
- Middle English · inherited fromknop
- English todayknop
From Middle English knop, from Middle Low German and Middle Dutch knoppe, from Proto-Germanic *knuppô, *knuppaz, *knappô, which is perhaps related to *knappō (“knob, boy”). Possible doublet of knave and knob.
Etymology from Wiktionary, CC BY-SA 4.0.