Greek short form of Irini and Irene, Estonian short form of both Irena and Renate, and Scandinavian and German short form of Renate and Renata as well as a short form of names beginning with the Germanic element regin or ending in -rena. This name is borne by German artist Rena Tangens.
From 玲 (re) meaning "sound of jewels, tinkling", 怜 (re) meaning "wise", 伶 (re) meaning "actor" and 七 (na) meaning "seven", 菜 (na) meaning "vegetables, greens" or 奈 (na) meaning "apple tree, what?, Nara". Other kanji combinations can be used.