English
headpin
From head + pin.
Proto-Indo-European *kap- ‘head’
…
Proto-Germanic *haubudą ‘head’
Proto-West Germanic *haubud
Old English hēafod ‘head’
Middle English heed ‘head’
English head
Proto-Indo-European *bend- ‘protruding object, pointed peg, nail, edge’
Proto-Germanic *pinnaz
Proto-West Germanic *pinn ‘pin, nail’
Old English pinn ‘pin, peg, bolt’
Middle English pinne
English pin
Today it means
noun The kingpin.
Language periods are conventional ranges, not dates for this word.
Etymograph / headpin