Where does “January” come from?

January derives from Latin ianuarius, named after Janus, ultimately from Proto-Indo-European h₁ey- meaning to go or proceed.

January (English): The first month of the Gregorian calendar, following the December of the previous year and preceding February

Definitions

  1. The first month of the Gregorian calendar, following the December of the previous year and preceding February

Ancestry of “January”, step by step

January traces back through two separate lines of ancestry.

via Middle English Ieneuer

StepLanguageWordMeaning
1Middle EnglishIeneuer
2Anglo-Normangenever
3Latiniānuāriusof January
4Latin-āriuser
5Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via Middle English Januarie

StepLanguageWordMeaning
1Middle EnglishJanuarie

Words derived from “January

Every word from Proto-Italic *-āzios