Of Greek origin.
From the ancient Greek name «Λάνασσα» (Lánassa).
She was a princess who lived in Siracuse, Sicily, at the 3rd c. BC.
She was the daughter of King Agathocles, the Greek tyrant of Syracuse and she became Queen of two major Greek kingdoms, of Epirus and Macedonia, after marrying King Pyrrhus and later King Demetrius I.
According to the Greek mythology, Lánassa was Hercules’ great-granddaughter and ancestress of the Molossian dynasty of Epirus.