The Isle Bia-Munkizonkel!
Fever Dream Island.
Gehenna Island
Maybe something simple, like:
Widow’s Isle
Devil Island
Razorreef Island
Corpse Island
Whiplash Key
Candlelight Isle
Stark Island
Skull Island
Pen island
That’s a real pen manufacturer. Your pen is our buissiness!!
The Island of Langerhans.
I’ve always wanted someone to riff on that.
Inferno Island
Daraqan Atoll.
If my early morning fiddling around with Proto-Austronesian is anywhere close, that’s something like “blood atoll/atoll of blood.” Plus it sounds a bit like “Dragon.”
Island of Misfit Toys?
Isle of Bones
Dead Man’s Island
Traitor’s Reach
Condemnation Island
Cannibal Rock
Massacre Island
Isle of the Lost
Manhattan?
Monks Hood? Fallstone? Enders? I mean, it doesn’t have to be called “Whatever Island” does it? I’m not sure I explained that, but do you see what I mean?
Isla de Lagrimas or
Triste Isle
Another good one I heard somewhere: Pedoph Isle.
I heard this gag on Mathnet, a segment of Square One TV, which had to be written in the late 80s or so. It took me a while before I realized that it was a gag, and I still am not so sure the embedded quote is from (OK, I guess I go google it now…)
Isla Calavera
Or in general principle, think of a ominous word in English, and look it up in several foreign languages…
Ilatan.
Or Illatan, for that exotic pronounciation.