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 has 9 variant forms: Iolanda, Iolanta, Iolantha, Jolantha, Jolanthe, Yolantha, Yolanthe, Yolley and Yollie.
For more information, see also related names Jolan and Violet.
Baby names that sound like Iolanthe are Iolande and Eolantha.