4: seems likely to be based on 'whale', but could be something else. Are otters aquatic? Because they have a decent set of letters to spin up and splice with an element.
5: I'm guessing MAEGLIN+MOLE on general principles, but there are other possibilities. My anagram skills are as weak as ever, so yeah.
6: Th*g*rlisgon actually looks pretty close to a Tolkien name, though not a specific one. I'd guess at least a couple of the words need anagramming.
hS
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