The Usada family ~How saitom named them?~

More and more saitom characters are coming into being, and the Usada family has been gathering attention through the new merchandises. I guess most of you are not interested in the family name itself but have you ever wondered how saitom named it or why the name?
CAUTION!
This post is nothing but my speculation that is not based on the info available for now. So please do not take it too seriously.

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