Gender Masculine Usage Japanese Scripts 九郎, etc.(Japanese Kanji) くろう(Japanese Hiragana) Pronounced Pron. /kɯᵝ.ɾo̞ː/ Meaning & History From Japanese 九 (ku) meaning "nine" and 郎 (rō) meaning "son". This name was traditionally given to the ninth son. Other combinations of kanji characters are also possible.