I don't remember where I heard this, but I read it on a forum. Somebody stated that Link goes on and settles down, has a few kids, so his bloodline keeps going. According to the timeline his bloodline would have to be thousands of years old, starting with Skyward sword. But correct me if I'm wrong but its just my opinion. I don't think that Link has a bloodline. I don't believe that every single hero of time is from the same blood. I know a lot of people believe this. But it just seems very unlikely to me. Because I just started playing Wind Waker for the 4th time, and the King of red lions tells Jabun that this is in fact the hero of time, and he is not in the same bloodline as the previous Hero. I know its not very good evidence, but I don't remember hearing anything about bloodline until Wind Waker. I know i have no real evidence to back up that its possible every Hero is different, but there just isn't really any evidence. Maybe with previous and future LoZ's they keep it that way so the players can use their imagination.