Where does “Irīna” come from?

Irīna (Latvian) comes from Latvian Irēna, from Ancient Greek Εἰρήνη, from Ancient Greek εἰρήνη, from Ancient Greek εἴρω, from Proto-Hellenic wéřřō, from Proto-Indo-European wéryeti, from Proto-Indo-European werh₁- — to speak, say.