Okay, this one had me digging through a bunch of catalogs and fan forums — Brown Fortunato doesn't pop up as a widely recognized public figure with an established bibliography, at least not under that exact name.
When I hunt for obscure creators I check library catalogs, ISBN listings, and author authority files first. In this case I ran into a few likely explanations: it could be a pseudonym used by an indie author, a misspelling or misremembering of a similar name, or even a fictional character's full name. For instance, the name Fortunato immediately reminds me of the character in Edgar Allan Poe's 'The Cask of Amontillado', so it's easy for names to collide in searches.
If you want concrete leads, try WorldCat, the Library of Congress name authority, VIAF, or social platforms where indie creators hang out (Twitter/X, Instagram, Goodreads, Bandcamp). If you can share the context — book, comic, game, or song — I can take another pass with more targeted searches. Either way, I kind of love the mystery here: tracking down hidden creators often turns up neat little zines and one-off projects that feel like treasure finds.