On “Eulalia:” me and my little etymology brain
“The term is supposedly derived from an ancient Norse, Viking, or Celtic word meaning ‘victory.’”1 “It comes from "Weialala leia", the lament of the Valkyries in Richard Wagner's opera Götterdämmerung, as quoted by T. S. Eliot in The Waste Land.”2
In The Waste Land, “modern (1920s) Europe has become an uncivilised place: not only in the fact that it has been the scene of a massively destructive war; but also in the sense that it has lost its way morally and spiritually.”3 In the poem, Eliot makes allusions to many older classic works of art. One of these, of course, is Götterdämmerung. The opera is German, but is written about the Valkyries of Norse stories, which is where “Norse, Viking, or Celtic” comes in. The Valkyries were mythical women who guided soldiers after their death. Apparently, they cried “Weialala leia” to mean victory, as far as Wagner transcribed it.
Or, at least, that’s as far as I can figure it. He must’ve been such a well-read man
1: Redwall wiki, where we get “victory”
2: Wikipedia, where we get everything about Wagner and Eliot, but keep in mind that this is un-cited
3: An explanation of The Waste Land
Also see “Brian Jacques discuss the term 'Eulalia' on the Redwall TV Series” <3