Why did the Greeks call their main gods Olympic?

The Olympic gods of Ancient Greece are the main deities of the Greek pantheon. They belong to the third generation of celestials, they follow after the first gods and titans. There are exactly twelve of them: Zeus, Hera, Poseidon, Athena, Demeter, Artemis, Apollo, Aphrodite, Ares, Hermes, Hephaestus, Dionysus or Hestia (in different sources).

When Zeus overthrew the father of the titan Kronos, he freed the brothers and sisters who were languishing in the womb of their father. Among them, Zeus was the youngest, but he defeated Kronos, and therefore became the main one and organized his residence on Mount Olympus. The ancient Greeks thought that the twelve main gods lived on Mount Olympus. Therefore, they were called Olympic.