Jesus' son?
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Yeah, what's with that? In the De Vinci Code He was supposed to have had a daughter. Oy...oy...oy...who are we to believe? (/s)
Hum ... perhaps the daughter lived, emigrated to europe and thus is buried elsewhere. :-)
Don't think I'm seriously defending the theory, but the fact the daughter's body was not there doesn't run counter to the Da Vince theory. And the boy may not be mentioned because it died in infancy - lots of that going around at that time.