Latin Meaning: The name Julianne is a Latin baby name. In Latin the meaning of the name Julianne is: Downy grace. A compound of the names Julie and Anne.Also can be interpreted as the feminine form of Julian: Youthful. Jove's child.American Meaning: The name Julianne is an American baby name.In American the meaning of the name Julianne is: Downy grace. A compound of the names Julie and Anne. Also can be interpreted as the feminine form of Julian: Youthful.he name Julianne is an American baby name. In American the meaning of the name Julianne is: Downy grace. A compound of the names Julie and Anne. Also can be interpreted as the feminine form of Julian: Youthful.