hi guys
In fact, i saw in an interview that Amon Amarth name derives from the World of the LOTR,and, for further info, you just have to have a look in your Silmarilion( book accounting for events through first age of middle earth but i think any one of you know this), ( an awesome GREAT SUPER book), and check the glossary of the book , renderig some names and words into the language of the book.
As well, itmust be noted that Summoning band draw its inspiration form the LOTR book ( especially the third age), for when you see the song's name, it's actually plain!!!
as for me, i by far prefer First Age, an era when elvens were much more mighty than Mithrandir( see, Glorfindel killed the Lord Of Balrog, on the peak of Gondolin ( or sthg like that, i don't remember accurately)