Baby Names Girl Names Meaning of the Name Mieko Updated January 23, 2026 by Jennifer M. Mieko Gender: Female Origin: Japanese Meaning: Already Prosperous ♥ Add to my Namelist What is the meaning of the name Mieko? The name Mieko is primarily a female name of Japanese origin that means Already Prosperous. People who like the name Mieko also like: Emiko, Miku, Mariko, Hazel, Midori, Emi, Maeko, Marcel, Theodore, Miles, Oliver, Milo, Elijah, Etienne Names like Mieko: Maze, Mikayo, Minze, Misu, Makaio, Moises, Mikiko, Mohawk, Musa, Ming, Meja, Meika, Maija, Michi, Min-Seo, Mejia, Macia, Mihoko, Monaco, Masakazu, Mance, Manica, Maceo, Momuso, Mikiesha, Mischa, Monico, Mikaia, Momoko, Maja Stats for the Name Mieko Mieko is currently not in the top 100 on the Baby Names Popularity Charts Mieko is currently not ranked in U.S. births