Kaiser is the German word for "emperor", descended from the Latin Caesar, the family name of Julius Caesar that became an imperial title. In Germany it is a surname rather than a first name, but American parents have adopted it as a bold title name in the spirit of King, Duke and Royal, helped by the sound of Kason and Kaison. Kaiser entered the US top 1000 in 2016, peaked at number 749 in 2022 and ranks number 836 among boys in 2025.