yes, Aaron it's one of the Oceanic 6...
I'm just reposting this cuz it explains it really well:
An open letter to every frickin' person who says "Aaron can't be one of the Oceanic 6, he wasn't even born....":Dear confused "Lost" viewer,
"The Oceanic 6" is a term coined by the media. It is not a scientific term. It does not take into account age, race, ethnicity, date of conception, etc. It does take into account this: A plane with 324 people on it crashed. All were presumed dead. Then, miraculously six survivors were found to be alive. They are Kate, Hurley, Jack, Sayid, Sun and Aaron. The media coined them The Oceanic 6. Somehow, "The Oceanic 5 Plus The Child Of One Of The Survivors Who As A Fetus Technically Wasn't On The Flight Manifest" didn't have the same ring to it. Hope this helps clear things up.
😄
there are no more survivor (known to the outside world) of the Crash : Jack, Kate, Hugo, Sayid, Sun and Aaron... they were the only six that came back to the world...
and according two Jack 2 other dead-survivors, one might have been Jin (If he's indeed dead, they must have returned with his body, as well as with one more body..or maybe he still on the island and the other six are not allow to return to rescue whomever got left behind