Where does “Nevuary” come from?

Nevuary (English) comes from English January, from Middle English Ieneuer, from Anglo-Norman genever, from Latin iānuārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “Nevuary”, step by step

StepLanguageWordMeaning
1EnglishJanuaryThe first month of the Gregorian calendar, following the December of the previous year and preceding February
2Middle EnglishIeneuer
3Anglo-Normangenever
4Latiniānuāriusof January
5Latin-āriuser
6Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)
Every word from Proto-Italic *-āzios