adj. noble, honorable
adv. nobly, honorably
n. nobleness, nobility
v. to distinguish, ennoble, dignify, make or become noble

Nonvul Bron, mahfaeraak dahmaan sahrot Vahlok wen lot ahkrin shaan ney muz ahrk dovah.
Noble Nord, forever remember the mighty Guardian whose great courage inspired both men and dragons.
(Word Wall for Shaan, Battle Fury)

Qethsegol vahrukiv vur do Faal Vahlok, nonvul aar se dovah wen dez lost wah qahnaar tahrodiis Miraak.
This stone commemorates the valor of the Guardian, noble servant of dragons whose fate it was to vanquish the treacherous Miraak.
(Word Wall for Vur, Valor)

Means ‘honorable’ and ‘worthy’ rather than ‘highborn’, not pertaining to royalty or royal families.

Possibly an antonym of vul ‘dark’.