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Old English ān (inherited)
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Middle English oon (inherited)
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North Frisian en (cognate)
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Proto-Germanic *ainaz (inherited)
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Ancient Greek ἀντί (mention)
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Proto-Indo-European *h₂énti (inherited)
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Proto-Indo-European *óynos (inherited)
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Icelandic enn (cognate)
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Low German un (cognate)
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Albanian edhe (cognate)
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Albanian ende (mention)