Freewill is not really a theme in this play, but rather it is about fate. It was predetermined that Oedipus would kill his father and marry his mother - even before he was born it was revealed to his parents by the oracle. It would have come about one way or another because it was his fate and the will of the gods and so on.
Our lives are both determined by fate and freewill.
"Rex" is Latin for "King". Oedipus Rex means "Oedipus the King".
Thebes is the setting of Oedipus Rex because it is the place where the story begins.
'King' is an English equivalent of 'Rex' in the play 'Oedipus Rex'.
The shepherd in Oedipus Rex is the person who rescues Oedipus Rex as a child. The shepherd also confirms the main character's fate.
Oedipus Rex, Oedipus at Colonus, and Antigone
Oedipus Rex is part of a four part collection of plays, three tradgedies and a comedy. We do not have the Comedy but the three tradgedies are "Oedipus Rex", "Oedipus at Colonus", and "Antigone".
Oedipus
Sophocles, an Ancient Greek playwright, wrote Oedipus Rex.
Antigone, Oedipus Rex, Oedipus at Colonus
Laius was the father of Oedipus who Oedipus killed.
Before I answer this question, what does Oedipus Rex means?