User blog comment:Miskos3/Fairy Tail Episode 234: Tartarus arc Prologue: The Nine Demon Gates, Review/@comment-24784846-20150523143043/@comment-96.255.231.61-20150524202035

Insisting on using Keith, Torafusa and Sayla is kind of like insisting on using Gerard instead of Jellal, or Gazille instead of Gajeel.

There's not any doubt, the names themselves were in the original broadcast itself, in english.

http://i.imgur.com/ipb0OP2.jpg http://i.imgur.com/B5S5wna.jpg http://i.imgur.com/1mqo3ek.jpg

They're also on the official Japanese website for the series.