Interesting piece of history that few are even aware of. Benjamin Franklin, James Wilson, John Adams, and others refer to the influence of the Iroquois. Historians can't agree on the extent of the influence, but at a minimum Iroquois federalism was part of the discussion.

Here is more info for anyone wanting to do a deep-dive on the subject:
http://www.politifact.com/truth-o-meter/statements/2014/dec/02/facebook-posts/viral-meme-says-constitution-owes-its-notion-democ/