Othonoi Othonoi Othonoi (, also rendered as Othoni) is a small Greek island in the Ionian Sea, located northwest of Corfu, and is the westernmost point of Greece. Othonoi is the largest of the Diapontia Islands. It is a former community of the Ionian Islands. Since the 2011 local government reform it is part of the municipality of Corfu, of which it is a municipal unit. The municipal unit has an area of 10.078 km and population of 392 (2011). In the 19th century the island was the capital of the Diapontia Islands municipality, which also included nearby islands of Ereikoussa,
Ionian Sea Sea, and from Piraeus westward. Calypso Deep, the deepest point in the Mediterranean at , is located in the Ionian Sea, at . The sea is one of the most seismically active areas in the world. The name "Ionian" comes from the Greek language . Its etymology is unknown. Ancient Greek writers, especially Aeschylus, linked it to the myth of Io. In Ancient Greek the adjective "Ionios" () was used as an epithet for the sea because Io swam across it. According to the "Oxford Classical Dictionary", the name may derive from Ionians who sailed to the West. There were