This pronunciation has been discussed repeatedly.
http://www.behindthename.com/bb/dosearch.php?board=gen&terms=eirian&operator=OR&in_subject=1&search_gen=1&when=allAccording to the consensus in the threads above, it's pronounced IE-ree-an.
L’écrivain doit donner une voix à ceux qui n’ont pas de voix dans la société.