Ithaca and Cephalonia belong to which group of islands?

Ithaca is a Greek island located in the Ionian Sea, off the northeast coast of Kefalonia and to the west of continental Greece. Ithaca's main island has an area of 96 square kilometres (37 sq mi) and had a population in 2021 of 2,862. It is the second-smallest of seven main Ionian Islands, after Paxi. Ithaca is a separate regional unit of the Ionian Islands region, and the only municipality of the regional unit. The capital is Vathy (or Vathi).

Cephalonia is the largest of the Ionian Islands in western Greece and the 6th largest island in Greece after Crete, Euboea, Lesbos, Rhodes and Chios. It is also a separate regional unit of the Ionian Islands region. It was a former Latin Catholic diocese Kefalonia–Zakynthos (Cefalonia–Zante) and short-lived titular see as just Kefalonia. The capital city of Cephalonia is Argostoli.

The Ionian Islands are a group of islands in the Ionian Sea, west of mainland Greece. They are traditionally called the Heptanese ('Seven Islands'), but the group includes many smaller islands as well as the seven principal ones.

As a distinct historic region, they date to the centuries-long Venetian rule, which preserved them from Muslim conquests for the Ottoman Empire, and created a distinct cultural identity with many Italian influences. The Ionian Islands became part of the modern Greek state in 1864. Administratively today, they belong to the Ionian Islands Region except for Kythera, which belongs to the Attica Region.