Unfortunately, these names are mostly Elvish (a language which I don't know
particularly well!). But here's the etymology of Sauron: According to
Letter, Nr. 297, Sauron was derived from *thaurond-, which came from the
adjective *thaura-, meaning "detestable." The proto-Elvish root is
*thaw. Tolkien claims that the resemblance to the Greek word for "lizard"
(saura -- i.e. Dino-saur, "dread lizard") was purely coïncidental. But
don't you believe him! Tolkien loved constructing "double-etymologies":
thus Mordor in Quenya id "black land," but in Anglo-Saxon means "murder"!
(There are further examples where a name has a fitting meaning in two
languages.)
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All that is gold does not glitter,
Not all those who wander are lost;
The old that is strong does not wither,
Deep roots are not reached by the frost.
From the ashes a fire shall be woken,
A light from the shadows shall spring;
Renewed shall be blade that was broken,
The crownless again shall be king.
