Now Herod the tetrarch heard of all that was done by him: and he was perplexed, because it was said by some, that John was risen from the dead;
All Commentaries on Luke 9:7 Go To Luke 9
Theophilus of Antioch
AD 184
Herod was the son of Herod the Great who slew the children, who was king, but this Herod was tetrarch. He inquired about Christ, who He was. Hence it follows, And he was perplexed.
For the Jews expected a resurrection of the dead to a fleshly life, eating and drinking, but those that rise again will not be concerned with the deeds of the flesh.
If John is alive and has risen from the dead, I shall know him when I see him; as it follows, And he sought to see him.