It sounds like you have some kind of other confirmation for this? Anything I can find online points to this HN post, which is "heard from a friend of the family". You couldn't rely on the guy to be telling you the truth so confirmation of the death using one of his pseudonyms isn't even close to official.
Looks like wikipedia won't allow a death date on his page yet anyway.
Looks like wikipedia won't allow a death date on his page yet anyway.