Complex sentence: Theodore Roosevelt V is another example, and should actually be Theodore Roosevelt VI, since U.S. President Theodore Roosevelt was actually a junior (named after his father), but that family started numbering with the president as if he had actually been the senior.
Split into simpler sentences: Theodore Roosevelt V is another example; he would be Theodore Roosevelt VI, had the family consistently incremented suffix without regard to the death of ancestors, since U.S. President Theodore Roosevelt was actually a junior (named after his father). That family started numbering with the president as if he had actually been the senior.