An Egyptian by race who founded Athens; whence also [the term] Kekropids [for Athenians].[1] Some say he had a double form: the upper [part] of a man, and the lower [part] of a woman, though some [say] of a beast. Others [say] that he invented laws for mankind and led them out of savagery into tameness. Others [say] that when he happened upon the men [of Athens] copulating with the women, and as a result he did not know which father had which child and which child had which father, he laid down laws so that they would have sex with the women in an understandable fashion and be content with one [woman], and because he discovered, in a manner of speaking, the two natures, that of the father and that of the mother, he was appropriately called "double-natured".[2]
And in the Epigrams: "Kekropian star of the tragic muse."[3]