Sorry to be a bit of a nerd on this, but, what does "seventh son of a seventh son mean?" It seems a bit vague-- Would it be the counting all the children?(i.e.--3 girls, three boys, and the seventh, a boy) or would it be any number of sisters, only counting the boys? And are they sons of a the same mother, or do you count all the sons of the father, regardless of the mother? And do you count the stillborns? Enquiring minds, you know...