Absyrtides or Apsyrtides or Apsirtides (; Italian: Arcipelago delle Absirtidi) was a collective name of two islands off the coast of Illyricum – Cres (Cherso in Italian) and Lošinj (Lussino in Italian), which were almost attached.
The islands were named after Absyrtus, who according to one tradition, was slain here by his sister Medea and by Jason,Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898), Absyrtides while according to another story because his dead body was drawn by the waves to the islands.Orphic Argonautica, 1020-1035
Ptolemy mentions only one island, Apsorrus (Ἄψορρος), on which he places two towns Crepsa (Κρέψα) (the modern Cres) and Apsorrus (the modern Osor, now all in Croatia).
References
Steph. Byz. s.v. Mel. 2.7. Plin. N. H. 3.26. Ptol. Geog. 2.16.13.