Where does “reins” come from?

reins (Middle French) comes from Latin rēnēs, from Latin Laurentius, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “reins”, step by step

reins traces back through two separate lines of ancestry.

via Latin rēnēs

StepLanguageWordMeaning
1Latinrēnēs
2LatinLaurentiusLaurence; Laurente
3Latin-iusforming adjectives from nouns; nominative neuter...
4Proto-Italic-jōsForms comparative adjectives
5Proto-Indo-European-yósCreates adjectives from noun or verb stems

via French Reims

StepLanguageWordMeaning
1FrenchReims
2LatinrēmiA tribe of Gallia Belgica whose chief town was Durocortorum
3Proto-Celtic*ɸreimoschief
Every word from Proto-Indo-European -yósEvery word from Latin -iusEvery word from Proto-Italic -jōs