Old English æcern

← Danish agern (cognate)

← German Ecker (cognate)

← Proto-Germanic *akraną (inherited)

← Old High German ackeran (cognate)

← Gothic 𐌰𐌺𐍂𐌰𐌽 (cognate)

← Proto-Indo-European *h₂ógeh₂ (derived)

← Old Norse akarn (cognate)

← Old Frisian akern (cognate)

← Old Saxon akeran (cognate)

→ English acorn (inherited)

→ English Accrington (derived)

→ Middle English acorn (inherited)

→ Scots aicorn (inherited)

→ Tocharian B oko (cognate)