In Greek it means Rainbow
The Greek Goddess Iris was a messenger, the connection between Heaven and Earth.
Purple irises were planted over the graves of women to summon the Goddess to guide them in the their journey.
France's Fleur de Lys is an Iris - The flower became associated with the French Monarchy before the Renaissance.
Japan-The flower is a means of expression for heroic deeds, the color blue symbolizes a blue blood and the Iris is used extensively in the Japanese Spring Festival