Save Gender Feminine Usage Japanese Scripts 睦世, 六世, 睦代, 六代, etc.(Japanese Kanji) Pronounced Pron. MOO-TSOO-YO [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 (yo) meaning "generation" or 世 (yo, se) meaning "world".