I too have been told this story by my older cousins. Apparently as a result of a mountain bare knuckles fight, when a Morgan killed his opponent. Another part of this story, is that he then fled to America (I did the same thing, but didn't kill anyone). It is difficult to confirm this, as it wouldn't have been "in the papers", and there are several Jeremiah families living in Goytre at that time. To confuse matters more, my brother told me that, as part of the religious revival in the 1800's, lots of families changed their surnames to biblical sounding ones.