Meaning A boy's name of Japanese origin, it means "It means respect, lucky, excellence, and wise". Origin of Kei/Kou Japanese Popular Middle Names Pronunciation 🔊 Listen Kei/Kou Similar Names Kei Adl Shohei Kichiro Aayan Yoshito Jawdat Juda Abdul Maajid Alaa Udeen Year by Year Popularity of Kei/Kou