Not trying to rain on your parade--you keep on doing you--but Lithien actually means 'daughter of ash' (which is perfectly cool) and 'river-wing' needs to be Nedhroval. When making compounds, n+r becomes dhr, and 'wing' is roval (rov- is a prefix form). Also, names don't typically have plurals in them, but rovail is 'wings' if you really must. Hopefully I didn't damper your spirits. =]
Oh, thank you! Daughter of ash works just as well, I only wanted it to do with ashes(Someone on tumblr helped me with that one) And I'm super new to elvish(And for that matter I mostly only dabble in tengwar) so I did the best I could with what I had, since I really wanted to avoid having to wait for a translator to help me out. So I really appreciate you helping me out! Unfortunately I already made the change on DA and it only lets you change your username once every six months, so I'll have to wait until march to change it to being correct, but I'd rather be corrected by someone than walk around with an incorrect name. :3