There is really not much evidence that Ganondorf is specifically named after any specific creature or person. I actually doubt that the Gerudo who raised Ganondorf to be their king would name him after something evil or demonic as he was meant to be their great leader. He was not raised to actually be a villain that takes over Hyrule. That was a later ambition he had himself. But Nintendo has not given us any evidence that his name has any special meaning. They might have chosen a generic name to fit into a medieval setting. The name Ganon itself is actually Gaelic and means Fair skinned.
http://www.thinkbabynames.com/meaning/1/Gannon
And Dorf is German for village. The surname Dorf can mean dweller of village.
http://surnames.meaning-of-names.com/Dorf/
The most common rationalization of him appearing as a pig in some games is that the pig form represents his unending greed for Hyrule, power, the triforce, Zelda, everything. He was a thief and was jealous of Hyrule and the Hylians and wanted their land. Their sun, moon, and wind as referenced in Wind Waker.
"My country lay within avast desert. When the sun rose into the sky, a burning wind punished my lands, searing the world. And when the moon climbed into the dark of night, a frigid gale pierced our homes. No matter when it came, the wind carried the same thing... Death. But the winds that blew across the green fields of Hyrule brought something other than suffering and ruin. I coveted that wind, I suppose." — Ganon
And this jealousy eventually grew into greed for power
Once every 100 years, a special child is born unto my people. That child is destined to be the mighty guardian of the Gerudo and the desert. But this child, its heart grew twisted with every passing year. The child became a man who hungered for power at any price."
They say that Ganondorf is not satisfied with ruling only the Gerudo and aims to conquer all of Hyrule!" — Gossip Stone
And the LttP story tells us that inside the Dark World anyone takes on the form of what they are in their heart. And Ganon took the shape of a pig. We can look to symbolism for the meaning behind a pig representing Ganon.
http://www.khandro.net/animal_swine.htm Is an excellent source of information on the symbology of the pig in various world mythologies. But closer to the point,
Usually, in Buddhist iconography, the pig represents desire in all its forms. This ranges from identification with one's body, through a general love of material possessions, as well as the lust for food or sexual satisfaction.
While the pig was sacred to Isis, the black boar (Sus scrofa) was associated with her brother and opponent, Seth. This black boar aspect was considered responsible for the obscuration of the sun during an eclipse. In one version, he gores Horus, the sun-god, putting out one of his eyes.
The sphinx was never meant to represent any devil in mythology. The Greek sphinx was a semi divine creature that guarded the entrance to Thebes and would ask a riddle to any travelers that entered. To the Egyptians the sphinx was associated with the goddess Sekhmet who was often represented as a lion. And the term pig-headed normally means stubborn even to the point of self defeating.
pig-headedadj stupidly stubbornpig-headedly adv
pig-headedness n
http://www.thefreedictionary.com/pig-headed
However Ganondorf later did gain the title Demon King Ganon, but this is most likely due to his takeover of the Dark World and command of an army of monsters. Not because of a birthright. And Now ever since Sprirt Tracks, Malladus could also be the more mythical demon king and possible satanic reference in the world of Hyrule.