The word 'ewe' descends unbroken from Proto-Indo-European *h₂ówis, a term attested across virtually every branch of the family — Latin ovis, Sanskrit avis, Greek oïs — making it one of the most securely reconstructed words in comparative linguistics, carrying five millennia of pastoral history.
An adult female sheep, from Proto-Indo-European *h₂ówis, one of the oldest and most securely attested animal terms in the language family.
The word 'ewe' descends from Old English ēowu, meaning 'female sheep', and stands as one of the most anciently inherited words in the English language. Its lineage passes through Proto-Germanic *awiz or *awi, a term for sheep in general, and ultimately traces to Proto-Indo-European *h₂ówis, reconstructed as the PIE word for sheep. This is among the best-attested PIE roots, appearing in virtually every major branch of the family: Latin ovis (sheep, source of English 'ovine'), Greek oïs, Sanskrit avis, Old Irish ói, Lithuanian avis, and Old Church Slavonic ovica. The breadth of this cognate set confirms that PIE speakers were sheep-herders long before the dispersal of their descendants across Eurasia — the word was carried intact by every branch because the animal was central to their subsistence economy. Regarding Grimm's Law: since the PIE word begins with a laryngeal followed by a vowel rather than a stop consonant, Grimm's consonant shift does not alter the onset. The word's inheritance into Germanic is instead confirmed through regular vowel correspondences between branches. In Anglo-Saxon England, the ewe was economically indispensable. Sheep provided wool, meat, and milk; wool became England's dominant export commodity from the early medieval period through the late Middle Ages, underpinning the entire English mercantile economy. The wool trade funded cathedrals, wars, and the rise of the merchant class. That the everyday word for a female sheep has remained phonologically stable from PIE through Proto-Germanic, Old English, Middle English, and into modern English — a span of perhaps six thousand years — reflects how deeply embedded pastoralism was in the cultures that spoke these languages. Key roots: *h₂ówis (Proto-Indo-European: "sheep — one of the most securely reconstructed PIE words"), *awiz / *awjō (Proto-Germanic: "sheep").
English 'ewe' and Latin 'ovis' are the same word — both descend directly from Proto-Indo-European *h₂ówis, meaning 'sheep', spoken on the Eurasian steppe around 3000 BCE. That the Lord Chancellor of England still sits on the Woolsack, a cushion stuffed with wool, is a fitting monument to the animal whose name has survived longer than most civilisations: the sheep that built the medieval English economy is commemorated in Parliament, and its name in English is older than Rome.