Kato is a name with several roots: among the Baganda of Uganda it is the traditional name for the "second-born of twins", in Japan it is a common surname, and in the United States it is best known from Kato, the Green Hornet's sidekick played by Bruce Lee in the 1960s television series. It also serves as a K-spelling of the Roman Cato. Kato ranked number 11313 in 2000, reached number 2455 in 2022 and sits at number 2664 in 2025 with 49 boys.