Save Gender Masculine Usage Japanese Scripts 代太郎, 大太朗, 大太郎, etc.(Japanese Kanji) Pronounced Pron. DAH-EE-TAH-ṘO: [key] Meaning & History From Japanese 代 (dai) meaning "era, age, decade" or 大 (dai) meaning "big, great", 太 (ta) meaning "thick, big" combined with 郎 (rou) meaning "son" or 朗 (rou) meaning "bright, clear". Other kanji combinations are possible.