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Last name Katay (Katay , Катай ) , in all the world, is quite a rare family name. The last name Katay is characteristic of Laos, where it is quite a rare surname, Hungary, and the Democratic Republic of the Congo, where it is a rare surname. Not in comparison with a country's population, the name is most common in India, the Democratic Republic of the Congo, and Myanmar. Likewise, Katay is the forename as well as the last name.