Why was he called Huckleberry Finn?

I'm curious, why do you think the protagonist of Mark Twain's novel was named Huckleberry Finn? Was it just a random choice, or did it hold some deeper meaning? Did Twain have a specific reason for selecting that name, or was it perhaps inspired by someone or something in his life? And what significance does the name Huckleberry Finn hold in the context of the story and its themes? I'd love to hear your thoughts on the matter.