Godmother

wiktionary

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From Middle English godmoder, from Old English godmōdor(“godmother”), equivalent to god +‎ mother. Cognate with Old High German gotmuoter(“godmother”), Old Norse guðmóðir(“godmother”), Icelandic guðmóður(“godmother”), Swedish gudmoder(“godmother”), Danish gudmor(“godmother”).

etymonline

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godmother (n.)

woman who sponsors one at baptism, late 13c., from God + mother (n.1); modifying or replacing Old English godmodor.