Another of his grandsons was torn to pieces by Agave, who was another of this man's daughters.  
He was the human grandfather of Melicertes, whose mother boiled him in a cauldron. He was also the grandfather of Actaeon, who was the son of his daughter Autonoe (aw-toe-NOH-ey).  Another of his grandsons was torn to pieces by Agave, who was another of this man's daughters.  Yet another of his daughters was burned to ashes while having sex with Zeus, while his son Polydorus was the ancestor of Oedipus.  Before having all these miserable offspring, he was told by the oracle at Delphi to follow a cow and build a city wherever it stopped to rest, although his quest began as an attempt to find his sister Europa.  FTP, identify this man who was instructed to sow dragon's teeth in the earth, thus engendering the people of Thebes.
He was the human grandfather of Melicertes, whose mother boiled him in a cauldron.
Cadmus