出典:Wiktionary
出典:『Wiktionary』 (2025/08/18 00:35 UTC 版)
Uncertain, probably from Old Norse Nanna, with Norse levelling of -nþ- to -nn- from Proto-Germanic *nanþ- (“brave, daring”), related to *ninþaną (“to dare”); or possibly from an Old Norse baby talk word for "mother," as in nanna, nanny.
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