You were such a wee thing. Oh, so frail, so fragile. I feared you wouldn’t make it. But your father… He never doubted. He always said you’d become the strongest of.<<< this is the cutest saddest thing ever
In the books, the babies that were named "Hiccup", were the runts that were not believed to make it. Therefore, it was a rule for the parents leave them to die. (Like on a hill out away from the rest of the tribe.