Someone help with my book !!!

Can anyone help me with a problem? Im trying to write a book and the bad guys are three evil 'super demons'. I need a name for them.
So far all i've got is
'Mordlaerds' - Lords of Death in Goblin tongue
'High Demons' - called this by Elven lord
'Dazrul' - Rulers of the Dark in Elven.

The first two are OK but Dazrul sounds like a washing liquid and if you swap the D for an N and the R for a G then you get Nazgul. Can anyone think of some decent names for them.

The Elven and Goblin tongues are not Tolkien but my minds weak attempts so any names will do as longs as they sound like a different language

Thanks to anyone that can help!