Regular as in not royalty or papacy or some other nobility.   Far back as in number of generations with the same name.    Most end the list with the third.   As in John Smith, John Smith II, John Smith III.   You start to see a drop off with  John Smith IV, even more of drop off when you get to John Smith V, (which is where I am), and so on.  This is what I mean about the name not going that far back.   It is in names of kings and popes that you see the higher Roman numbers,  Henry VIII and the like.   Does this make it clear?