Woe

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natural exclamation of lament: recorded as wā in Old English and found in several Germanic languages.

wiktionary

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From Middle English wo, wei, wa, from Old English wā, wǣ, from Proto-Germanic *wai(interjection), whence also Dutch wee, German Weh, weh, Danish ve, Yiddish וויי‎ (vey). Ultimately from Proto-Indo-European *wáy(interjection). Compare Latin vae, Albanian vaj, French ouais, Ancient Greek οὐαί(ouaí), Persian وای‎ (vây) (Turkish vay, a Persian borrowing), and Armenian վայ(vay).

etymonline

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woe (n.)

late 12c., from the interjection, Old English wa!, a common exclamation of lament in many languages (compare Latin væ, Greek oa, German weh, Lettish wai, Old Irish fe, Welsh gwae, Armenian vay).