Kairo is a modern American spelling of Cairo, the Egyptian capital, whose Arabic name al-Qahira means "the victorious" or "the conqueror". The K gives it the same bold look as Kai and Kayden, and it belongs to the trend of using world cities like London, Memphis and Rome as first names. Kairo entered the US top 1000 in 2017 and has rocketed from number 1819 in 2015 to number 226 in 2025, its highest rank so far.