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Old English cnēo (mention)
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Proto-Germanic *knewą (inherited)
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Proto-West Germanic *kneu (inherited)
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Old High German knio (cognate)
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Ancient Greek γόνυ (cognate)
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Proto-Indo-European *ǵónu (derived)
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Old Norse kné (cognate)
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Old Frisian knē (cognate)
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Old Saxon knio (cognate)
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Sanskrit जानु (cognate)
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Old Armenian ծունր (cognate)