Since there's not much information given, it's hard to say exactly who Free Willy Randolph is. He might be a fictional character created for a specific purpose, like to teach a moral lesson. Or he could be a real person whose story has been passed down in a particular area, and 'free' might be a key aspect of his identity or a significant event in his life.
Yes, there might be. The Naruto and Attack on Titan fandoms are both huge, and fans often like to cross over their favorite characters in fanfiction. So it's quite possible to find Eren - from Attack on Titan - in Naruto fanfiction. However, it may not be as common as fanfictions within each respective universe.
No. Willy Wonka is a fictional character from the novel 'Charlie and the Chocolate Factory' which was first published in 1964. Although the story is set in an imaginative world full of magic and wonder, it has no basis in real events from 1896 or any other time in that regard.
Willy Wonka is about a mysterious and eccentric chocolatier who invites a group of children to his factory for a wild adventure filled with sweet surprises and challenges.