Is more info on this available?
http://facingislam.blogspot.com/2014/01/isis-or-isil-importance-of-name-of-al.html
http://stacyontheright.com/?p=5218
http://www.reddit.com/r/OutOfTheLoop/comments/2e5b0s/why_is_pres_obama_referring_to_isis_as_isil/