According to
Plutarch, the name Ios is thought to derive from the Ancient Greek word for
violets, "
ἴα", (ia) which were said to grow abundantly on the island – an etymology that remains the most widely accepted. Another theory suggests a Phoenician origin, from the word iion, meaning "pile of stones".
Pliny the Elder offered a different explanation, claiming the name came from the
Ionians who once inhabited the island. During the Ottoman period, the island was known as 'Anza' or 'Aina', Its modern name, Ios, was officially established in the 19th century, though it had already been in use for two millennia. In antiquity, the island was also called "Φοινίκη" (Phiniki), named by and after the
Phoenicians. In the 3rd century BCE, when Ios joined
League of the Islanders, it was temporarily renamed Arsinoe, in honour of
Arsinoe II, the wife of
Ptolemy II During the time of Ottoman rule, travellers sometimes called it "Little Malta", a nickname reflecting the island's reputation as a haven for pirates. In Latin script languages, the island's name appears as Nio or Io. ==Geography and geology==