The origin of the word ‘iron’ is shrouded in mystery.
It comes from a Proto-Germanic word that was most probably borrowed from Proto-Celtic *īsarnom, the ancestor of Irish ‘iarann’. The Celts were skilful metal workers during the Iron Age.
However, tracing *īsarnom further back has proven to be hard.
My new graphic shows four hypotheses, as well as the many descendants of *īsarnom in Celtic and Germanic:
