Threw

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Old English thrāwan ‘to twist, turn’, of West Germanic origin; related to Dutch draaien and German drehen, from an Indo-European root shared by Latin terere ‘to rub’, Greek teirein ‘wear out’. throw (sense 1 of the verb), expressing propulsion and sudden action, dates from Middle English.

wiktionary

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From Middle English threw, from Old English þrēaw (first and third person past tense of þrāwan), from West Germanic *þreu, from Northwest Germanic *þrerō, from Proto-Germanic *þeþrō (first and third person past tense of *þrēaną), reduplication of *þrēaną.

etymonline

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threw

past tense of throw (q.v.).