User blog comment:BlackWizardZeref/Fairy Tail: Chapter 436 Memoirs Review with a brief mentioning of Chapter 435 Victory Shout!/@comment-25229960-20150519155608

Was it ever confirmed that Natsu's last name was made from Igneel? (Source? I think it was a reader assumed type deal). I honestly thing that Natsu making his own last name was a fan based answer.