Aesacus

The death of the Nymph Hesperia by Elie Delaunay.

In Greek mythology, Aesacus or Aisakos (/ˈsəkəs/; Ancient Greek: Αἴσακος) was a son of King Priam of Troy. Aesacus sorrowed for the death of his wife or would-be lover, a daughter of the river Cebren, and was transformed into a seabird.