Kleo is a spelling of Cleo that is closer to the Greek original; it comes from kleos and means "glory", the root of Cleopatra, "glory of the father". The K spelling is standard in Germany and the Netherlands and has a crisp, modern look in English. In the United States Kleo has climbed steeply from around number 11,000 in 2015 to number 2872 in 2024 and number 2874 in 2025.