←
Old English upon (inherited)
←
Old English uppon (mention)
←
Old English uppan (mention)
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Middle English upon (inherited)
←
Middle English uppon (mention)
←
Middle English uppen (mention)
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Icelandic upp (cognate)
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Icelandic upp á (mention)
→
Norwegian Bokmål på (cognate)
→
Norwegian Nynorsk på (cognate)