sentences:  The "Physiologus" began switching the illustration of the siren as that a mermaid, as in a version dated to the 9th century.Whereas the 10th century Byzantine Greek dictionary "Suda" still favored the avian description.Therei is a modern Greek legend that Alexander the Great's sister Thessalonike did not die and turned into a mermaid () after her death, living in the Aegean.