The Names of Sauron

[Galin]

Tolkien did change his mind after letter 211 however, with respect to the Valar having a language (they did), and Valarin Arǭmēz for example, was said to be a name adapted to Quenya as Orome, and to Sindarin as Araw.

'The Eldar,' he says, 'now take the name to signify "horn-blowing" or "horn-blower"; but to the Valar it had no such meaning. Now the names that we have for the Valar or the Maiar, whether adapted from the Valarin or translated, are not right names but titles, referring to some function or character of the person; for though the Valar have right names, they do not reveal them.

Save only in the case of Orome. For it is said in the histories of the most ancient days of the Quendi that, when Orome appeared among them, and at length some dared to approach him, they asked him his name, and he answered: Orome. Then they asked him what that signified, and again he answered: Orome. To me only is it given; for I am Orome. Yet the titles that he bore were many and glorious; but he withheld them at that time, that the Quendi should not be afraid.'

JRRT, Quendi And Eldar