I'm not sure exactly how many are on the list you mentioned. There are quite a few, with Edgar Rice Burroughs writing many Tarzan novels over the years.
Tarzan is purely fictional. The character and the adventures associated with him were made up for entertainment. There's no historical basis or real events behind it.
Tarzan's story is purely fictional. It doesn't have any basis in reality. It's a creation that has captured people's imaginations over the years through books and movies.
Definitely not real. Tarzan is a fictional character. The story is a product of the author's imagination. It doesn't represent any actual historical or factual events or individuals.
Tarzan is indeed an original story. It introduced unique characters and settings that captured the imagination of many. The concept and plot were crafted specifically by the author and weren't based on pre-existing works to a significant extent.