Save Gender Masculine Usage Japanese Scripts 睦彦, 六彦(Japanese Kanji) Pronounced Pron. MOO-TSOO-KHEE-KO [key] Meaning & History From 睦 (boku, moku, mutsu.bu, mutsu.mu) meaning "friendly, harmonious, intimate", or 六 (riku, roku, mu, mui, mu'.tsu, mu.tsu) meaning "six" combined with 彦 (hiko) meaning "boy, prince".