In English the meaning of the name Joanne is: The name Joanne is an American baby name. In American the meaning of the name Joanne is: The name Joanne is a Latin baby name. In Latin the meaning of the name Joanne is: God is gracious. Feminine form of John (from the Latin Johanna). The name Joanne is a French baby name. In French the meaning of the name Joanne is: God is gracious.