Name in vain

So I meet this guy last week. He mumbles a bit. I ask him his name. He says (I think), "Jose."

So I all brightly and all, say "Jose? Ola!"

He looks a little confused but smiles and says, "Yes."

A little later I ask him where he's from; he says Iraq.

Now I'm confused.

Later that evening, back in the hotel room, I find him online and realize his name is actually Hossein.

Now I'm thinking, he must be wondering why this random guy suddenly upped and called him Allah.