Even for a character name, it seems too much. Seems too distinctive, like if Orpheus was a character in one book or series, you could never use the name for any character of yours, like you can't name the gruff old plumber in your new short story Harry Potter.
that's kind of what I meant...Couldn't remember Morpheus, but that's the one. It's fine for a sci-fi character, but after the Matrix, you could never use Morpheus for any other character.
We better tell the writers of Little Nemo, the Sandman comics, and Resident Evil that the name they picked for their characters was already taken by the Matrix. One Morpheus Limit!