Board Thread:Lore Discussion/@comment-85.74.137.231-20130605091958/@comment-9887604-20130702201719

There is no blood line connection between major dragon born, not any that can be directly proven, the only blood lines mentioned in game are that of the dragon blood. There is a stark difference between being a dragon born, and having dragon blood.

The dragon bloodline is only relevant when talking about the amulet of kings, and the lighting of the dragon fires.