In The Penguin miniseries, however, the portrayal of Oswald's actions is slightly different. Episode 7, “Top Hat,” provides a flashback to Oswald's childhood, where he and his brothers Jack ...

No longer is he known as Oswald Cobblepot. Instead, the main character of HBO's The Penguin is known as Oswald 'Oz' Cobb. And this apparently isn't just some thing where he'll get his real name later.