American Meaning: The name Mimi is an American baby name. In American the meaning of the name Mimi is: Resolute. Hebrew Meaning: The name Mimi is a Hebrew baby name. In Hebrew the meaning of the name Mimi is: Wished-for child; rebellion; bitter.French Meaning: The name Mimi is a French baby name. In French the meaning of the name Mimi is: Form of Williamina. Spanish Meaning: The name Mimi is a Spanish baby name.n Hebrew the meaning of the name Mimi is: Wished-for child; rebellion; bitter. French Meaning: The name Mimi is a French baby name. In French the meaning of the name Mimi is: Form of Williamina. Spanish Meaning: The name Mimi is a Spanish baby name.