Astaldo

Aulë

Estë

Eönwë

Gorthaur

Ilmarë

Ilúvatar

Irmo

Kementári

Lórien

Mandos

Manwë

Melian

Melkor

Morgoth

Like its cousin Tessa, Nessa -- a shortening of Vanessa or Agnes or Anastasia among other possibilities -- is an attractive nickname that can stand on its own. 

Nessa

Nienna

Námo

Olórin

Oromë

Ossë

Sauron

Súlimo

Tulkas

Uinen

Ulmo

Commonly heard in Israel, but here it could be an unusual way to honor Grandma Rose. 

Varda

Vairë

Vána

Yavanna

Sassy37's list "The Valar Maiar and the Enemies" of 30 great name ideas: Astaldo - Yavanna!

The Valar Maiar and the Enemies

These are the names of the Valar, the Maiar and the Enemies as mentioned in 'Valaquenta' in The Silmarilion by J.R.R. Tolkein.