A Spanish surname, Oviatt in Latin comes from the term ‘overtum.’ Variations in spelling for Oviatt include De Ovieta, Oviett, Ovett, Oviaco, Ovieco and Oviedo. From Spain the several Oviatt families resettled in Mexico, Peru and Puerto Rico. In England the city of London is the main location for Oviatt families. Within the United States the Oviatt families live in Connecticut, Ohio, California, Utah, Oregon, Missouri and New York. Famous: Delmar T. Oviatt (educator who established a library with California State University) and Miles M. Oviatt (awarded the Congressional Medal of Honor during the Civil War).