>>6201953As a huge fan of Usagi Yojimbo, I agree on the point of "Usagi Yojimbo" beimg confused for his name, as it is what I thought as a child.
HOWEVER, if my first toy was labelled Miyamoyo Usagi, I would not have recognized that it had a comic, because it was through recognition of the Usagi Yojimbo title that I discovered the comic in a dollar bin of my local comic shop.
I think having the "wrong name" is better for the franchise than using the right one and losing the connection to the source material.
Plus, what do you care? You know his real name, and anyone who cares about the character will eventually find the real character name with a quick google search and some research.