پرن (paran, “past, last night”) + دوش (duš, “last night”). The first part is akin to Parthian [Term?], for the second part compare Sanskrit दोषा (doṣā, “darkness, eveningn, night”), Avestan 𐬛𐬀𐬊𐬱 (daoš, “night, last night”).
پرندوش • (paranduš) (obsolete)