You searched for: “aristonyms”
aristonym (s) (noun), aristonyms (pl)
A surname or a last name that is used as, or derived from, a formal title of nobility; such as, Thomas Harold Andre Le Duc.
This entry is located in the following unit: -onym, -onymy, -onymic, -onymically, -onymous, -onymously, -nym (page 3)