User blog comment:IamJakuhoRaikoben/Chapter 351: Eternal Flame, Review./@comment-187.79.18.199-20130913182951/@comment-7418318-20130913195633

I'm pretty sure Wendy never came in contact with Igneel and considering that Igneel was shown to be in a volcano Atlas Flame is the more likely candidate, particularly with his constantly being enveloped by flames.