I think it doesn't makes sense that Han Solo is not his real name. I once read that it was meant to be a play on words to be like John Doe: the thing about him is that he's that, a John Doe, Juan Nadie (no one in Spanish),Solo like solitude. It's sad if its his real name, but ridiculous if it isn't. I mean,you're a lonely child and name yourself the space version of John Doe?I don't think so!Han Solo with his awkwardness and the innocence of a child would have named himself something super cool!
Maybe, according to the EU he is an orphan who was in the streets when a guy named Shrike took him in to his ship (the Trader’s Luck) and Han would steal and sell stuff for this guy who apparently knew who he was but wouldn’t tell him. Then he found out about his parents (his mom’s name was Jaina - and Han named his daughter after her) and Solo was actually his surname so I guess the new movie could go that way, with Han finding out where he comes from and then getting the name Han Solo as it is actually his name. And of course the article could have meant figuratively and it’s about his reputation and not actually his name. We’ll only know when the movie is out I guess!