Where does “*iānārius” come from?

*iānārius (Vulgar Latin) comes from Latin iānuārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “*iānārius”, step by step

StepLanguageWordMeaning
1Latiniānuāriusof January
2Latin-āriuser
3Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

Words derived from “*iānārius

Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from Latin iānuārius