Rainerius

== Latin == === Etymology === Derived from Proto-West Germanic *Raginahari — likely through Old Italian Rainerio — from Proto-Germanic *Raginaharjaz, derived from *raginą (“decision, advice, counsel”) +‎ *harjaz (“commander”). === Proper noun === Rainerius m sg (genitive Raineriī or Rainerī); second declension (Medieval Latin) a male given name from Proto-West Germanic [in turn from Proto-Germanic] ==== Declension ==== Second-declension noun, singular only. 1Found in older Latin (until the Augustan Age).