3 English words descend from Ancient Greek Εἰρήνη, most common first.
ireneThe hydrocarbon formed by dehydration of an irone.
EireneThe goddess and personification of peace; one of the Horae, she is a daughter of Zeus and Themis, and her sisters are Dike (Justice) and Eunomia (Order of Law); her Roman counterpart is Pax.