The Sludge,

i dont think mary gave birth to any other child, its said that mary was a virgin but god made her pregnant hence the PF lot calling her all sorts as she wasnt married, imo there isnt anyone with Jesus's bloodline...who knows though mate, we dont really know what goes on in earth..

here is an interesing one for people to research/read up on.. the pharoe's bloodlines

have a look