Father of Voronwë (S/239), his name seems to be a compound of aran “king” and the (often masculine) name-suffix -wë.
Quenya
Aranwë
kingly person
aranwë
masculine name. *King-person
aranwion
masculine name. Son of Aranwë
Nólion
son of knowledge
Nólion (ñ?), second name of Vardamir Nólion (UT:210). Perhaps "son of knowledge", nólë (q.v.) + -ion "son", which ending displaces a final -ë (compare Aranwion "son of Aranwë", UT:50 cf. 32)
Aranwë masc. name *"Kingly Person" (Silm); Aranwion patronymic "son of Aranwë" (UT:50 cf. 32)