What is "caliadne"

Caliadne (; also Caliadna), in Greek mythology, is a naiad of the river Nile, presumably one of the daughters of the river-god Nilus. She is one of the wives of Aegyptus, bearing him twelve sons: Eurylochus, Phantes, Peristhenes, Hermus, Dryas, Potamon, Cisseus, Lixus, Imbrus, Bromios, Polyctor, and Chthonios. These sons married the daughters of her sister Polyxo, and were murdered by them.