This went completely off the rails, it's actually kind of funny.

Kind of reminds me of JK Rowling backfilling all of that stuff in the Harry Potter books (now there's Luna Love good!.) Or Nintendo retconning Bowser's sons and replacing them with Bowser Jr.

Sometimes there just isn't that much thought behind a character.

LttP officially named him Ganondorf Dragmire. Sounds like they were just giving a generic, intimidating European fantasy name. The rest of the early games are that kind of thing, enchanted woods with fairies and knights.

There's not a lot that makes sense in the Zelda theming. Link is officially Christian somehow, at least through LttP. Gerudo Valley is like the Middle East in OoT, which I would say is just loose theming but the Fire Temple has literal Islamic chanting. First few games had King Harkinian of Hyrule which sounds a bit like he's Armenian. The game series is named after author Zelda Fitzgerald.

The argument hinges on Ganon's sprite in the original Legend of Zelda looking like the a monster from Kamen Rider and the skull on Ganon's belt looking like the monster group's symbol.

I don't think either looks similar, at all. I don't get how you can look at a symbol of an eagle entwined with a snake and say, oh yeah, the skull pixel art they made for Zelda? Totally inspired by that. Not just a skull, you know, that symbol traditionally associated with evil. And Ganon looks like some kind of big pig man, not some vague crab-bat hybrid (e.g., he has no claws or wings). It then the article goes on to cite an Iwata Asks episode where the say the inspiration was a pig character from the Journey to the West, so I'm not sure why it's trying to seek some odd alternative explanation.