Legally the richest of the world is still the owner of the Amazon, but the matter is not registered, we don't know, but if you know, it would be better if you included an article link stating that the person other than the Amazon owner is the richest in the world today.
I think you dont know the name of the amazon online store owners name because he's the same person mentioned by the OP and most of the above users as the richest person. Besides, this was also confirmed by the Forbes that the name Jeff Bezos i.e Amazon owner is the richest man and i believe there's no need of including an article link