Dono/tono
Tono (殿?), pronounced dono when attached to a name, roughly means "lord" or "master." It doesn't equate noble status, rather it is a term akin to "milord" or French "monseigneur," and lies between san and sama in level of respect. This title is no longer used in daily conversation, but it is still used in some types of written business correspondence, as well as on certificates and awards, and in written correspondence in tea ceremonies.
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is dat a clue