Cecrops II was the legendary or semi-legendary son of Pandion I

Pandion I

In Greek mythology, Pandion I was a legendary king of Athens, the son and heir to Erichthonius of Athens and his wife, the naiad Praxithea. He married a naiad, Zeuxippe, and they had four children, Erechtheus, Butes, Procne, and Philomela. His rule was unremarkable...

 and inherited the Athenian throne from his brother Erechtheus

Erechtheus

Erechtheus in Greek mythology was the name of an archaic king of Athens, the re-founder of the polis and a double at Athens for Poseidon, as "Poseidon Erechtheus"...

.

Cecrops is said to have divided his territory into twelve districts; to which Strabo

Strabo

Strabo, also written Strabon was a Greek historian, geographer and philosopher.-Life:Strabo was born to an affluent family from Amaseia in Pontus , a city which he said was situated the approximate equivalent of 75 km from the Black Sea...

 assigns the names Cecropia, Tetrapolis, Exacria, Decelea, Eleusis, Aphidna;, Thoricus, Brauron, Cytheris, Sphettus, Cephissia, and Phalems. In each of these districts there was a town or village, into which he introduced a form of religion, erected altars to the gods, and caused justice to be administered according to some salutary laws which be established. After ruling for forty years, he was ousted by Metion

Metion

In Greek mythology, Metion was a son of King Erechtheus of Athens or of Eupalamus, son of King Erechtheus. His sons later drove King Pandion II out of Athens into exile. Among these sons were Eupalamus, Sicyon, and Daedalus, though they are sometime credited with other parentages. These usurping...

 and Pandorus

Pandorus

In Greek mythology, Pandorus was a son of Erichthonius II of Athens and Praxithea. Pandorus was also the sibling of Metion and Cecrops.Pandorus was a very accomplished archer who fought in Homer's Iliad. Typically archers were seen as inferior soldiers compared to swordsmen. In Book IV, he was...

, and fled to Aegilia

Aegilia

Aegilia is a genus of moths of the Noctuidae family.-Species:* Aegilia describens Walker, [1858]* Aegilia indescribens Prout, 1922-References:* *...

 or Aegialea where he eventually died. Cecrops was succeeded in Athens by his son Pandion II

Pandion II

In Greek mythology, Pandion II was son and heir of Cecrops II, King of Athens. and his wife Metiadusa. He was exiled from Athens by the sons of his uncle Metion who sought to put Metion on the throne. Pandion fled to Megara where he married Pylia, daughter of King Pylas. Later, Pylas went into...

 (though Pandion II has also been said to be his nephew, the son of Erechtheus).