Kasdan explained that the character was named Korso, and while he went through a significant evolution over the course of the script writing process, at one early point he was set to be Lando Calrissian’s big brother.
The news comes via a fan on Twitter who posted an image of a character that we never actually see in Solo: A Star Wars Story.
The character was part of a sticker book released in the UK, that apparently was finalized long before the movie actually was.