In
the beginning, in around 3,000 BC it was called Stroggyli (=round) because of
its round shape before the Minoan eruption. Afterwards it was called “Kallisti”
by the Phoenicians, which means the most beautiful. After the eruption, the
island was uninhabited for 5 centuries, until the Spartans colonized the island
and named it after their King Thiras. Thera is the official name even nowadays.
During
the Middle Ages, after the Venetians conquered the island, it was called “Santa
Irini”, which later became Santorini.
So,
don’t get confused since the name of the island is Thera and the name of the
capital is Firá. But don’t worry, it all sounds Greek to you!