Leucosia may refer to any of the following: Leucosia (crab), a genus of crabs Leucosia, a possible name for one of the sirens of Greek mythology. Leucosia, a former name for Nicosia, Cyprus Kira Underwood, a deceased character in Ready Player One whose persona is Leucosia. Cyclone Leucosia, a powerful Mediterranean tropical-like cyclone which affected Malta, southern Italy, and Greece in 1982. Leucosia, the ancient name of Licosa