Meaning and name origin
Iolanthe \i(o)-lan-the, iol(a)-nthe\ as a girl's name is of Greek origin, and the meaning of Iolanthe is "violet flower". Yolanda is the more common Spansh form. "Yolanda" was an operetta by Gilbert and Sullivan in 1882.
Iolanthe is not a popular first name for females and an equally uncommon surname or last name for all people (2000 U.S. Census).
A suggested similar baby name is Iolande. Like Iolanthe, this name is not commonly used.