From Japanese 鞠 (mitsu) meaning "ball", 光 (mitsu) meaning "light", 三 (mitsu) meaning "three", 美 (mi) meaning "beautiful" or 満 (mitsu) meaning "full, fullness, enough, satisfy", 都 (tsu) meaning "metropolis, capital, all, everything" combined with 羽 (ha) meaning "feathers", 波 (ha) meaning "waves, billows, Poland" or 葉 (ha) meaning "leaf". Other kanji combinations are possible.
From Japanese 三 (mitsu) meaning "three", 光 (mitsu) meaning "light", 蜜 (mitsu) meaning "honey", 密 (mitsu) meaning "dense, secret", or 鞠 (mitsu) meaning "ball" combined with 葉 (ha) meaning "leaf", 波 (ha) meaning "wave", or 羽 (ha) meaning "feather". Other kanji combinations are possible. A fictional bearer of this name is Mitsuha Miyamizu (宮水 三葉) from the 2016 anime movie Your Name/Kimi no Na wa.