Board Thread:Naruto Discussions/@comment-4057898-20140927111515/@comment-5407586-20140927113507

When Kaguya cast the Infinite Tsukuyomi before her sons defeated her, some of the people trapped in the genjutsu were turned in White Zetsu before Hagoromo could release them. The so called original White Zetsu is the first of the Zetsu that were extracted from the Demonic Statue of the Outer Path by Black Zetsu, while Madara thought he had created them through the use of Yin-Yang Release. The reason the other White Zetsu refer to him as the "original" was because they were created by Obito through the chakra of the seven tailed beasts that were sealed in the Demonic Statue before the Fourth Shinobi World War using the original White Zetsu as a model.