>What's the meaning of names like Eber, Niul,
Gaedhal, etc.
Gaedel [Goedel] Glas is the eponymous ancestor
of the Gaels. This character is a late invention, as the ethnic name
Gaedel/Goedel was a late borrowing from Welsh Gwyddel [Old Welsh
*Goidel] (which comes from a Celtic *Uedelos "wild" from PIE *weid- "see,"
having a secondary meaning of "seer," leading to the semantic shift towards
"wild/possessed one").
-C. Gwinn