
1) King of Mycenae 2) Play by Euripides 3) Play by Seneca the Younger
Found on
https://www.crosswordclues.com/clue/thyestes

In Greek mythology, Thyestes (pronounced z, Θυέστης, tʰyéstɛːs) was the son of Pelops and Hippodamia, King of Olympia, and father of Pelopia and Aegisthus. Thyestes and his brother, Atreus, were exiled by their father for having murdered their half-brother, Chrysippus, in their desire for the throne of Olympia. They took refuge in Mycen...
Found on
http://en.wikipedia.org/wiki/Thyestes
[genus] Thyestes was an extinct genus of ostracoderm fish of Europe that lived in the Late Silurian Wenlock epoch. It superficially resembles Cephalaspis, but was closely related to Auchenaspis and Tremataspis. ...
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http://en.wikipedia.org/wiki/Thyestes_(genus)

(from the article `Atreus`) in Greek legend, the son of Pelops of Mycenae and his wife, Hippodamia. Atreus was the elder brother of Thyestes and was the king of Mycenae. The ...
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http://www.britannica.com/eb/a-z/t/47

In Greek mythology, the son of
Pelops and brother of
Atreus. His rivalry with Atreus for the kingship of Mycenae was...
Found on
http://www.encyclo.co.uk/local/20688

In Greek mythology, Thyestes was the brother of Atreus, king of Argos.
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http://www.probertencyclopaedia.com/browse/D1T.HTM

In Greek mythology, the son of Pelops and brother of Atreus. His rivalry with Atreus for the kingship of Mycenae was continued by their sons, Aegisthus and Agamemnon
Found on
https://www.encyclo.co.uk/local/21221

Brother of Atreus; Atreus killed three of his sons and served them to him at banquet.
Found on
https://www.infoplease.com/arts-entertainment/mythology/greek-and-roman-myt
No exact match found.