He is the Attic hero and the eponym of the Athenian phyle called Hippothoontis (Ιπποθοωντίς).
Hippothoon was the son of Poseidon and Alope, Cercyon's daughter.
[1] Hippothoon was stated to be present in the missions of Triptolemus and was mentioned along with Eumolpus as an Eleusinian hero who was worshiped according to honorary decrees dating to the 4th century BC.
He was also described as the host of Demeter, instead of Celeus, during her wandering in search of Persephone.
[2] According to Pausanias, a heroon was dedicated to him for worship by hereditarily assigned priests.