Why, if a person were fictitious, would anyone try to preserve their bones? Bone fragments supposed to be of John the Baptist were tested for authenticity by scientists fairly recently. See National Geographic article: http://news.nationalgeographic.com/news/2012/06/120618-john-the-baptist-bones-jesus-christ-bible-bulgaria-science-higham/ Rather than finding them spurious, the evidence of testing, even DNA testing, is consistent with the likelihood they really are from the body of John the Baptist. So it is plausible that John the Baptist is historical. This leads to the likelihood this DNA is from a very close relative of Jesus of Nazareth, his cousin, and therefore close to Jesus' own DNA, there beyond our world's reach, resurrected.
