Number of Tatha  Does anybody have any knowledge of how many tatha there were in Ireland Obviously it was constantly changing but does anyone know the average number through the period they existed I remember hearing from school that there was about  tatha in Ireland in the middle ages And if as this article says a Tath had about  people that would mean about  million on the whole island which sounds about right from what Ive heard of population estimates of the time So should I just add in the  figure as I do distinctly remember being told that number in school