The family Pandionidae has a single member Pandion heliaetus; known as Osprey or Fish-Hawk. The family belongs to the order Accipitriformes.
Accipitriformes from Latin accipiter/accipitri- "hawk", and Neo-Latin -formes "having the form of".
The family name Pandionidae derives from Pandíōn, the mythical Greek king of Athens and grandfather of Theseus, Pandion II.