About Draco I, Δράκον
Draco I. Lived 5th to 4th centuries BC, was the son of Hippocrates, the famous physician (Hippocrates II). He was the brother of Thessalus. Galen tells us that some of the writings of Hippocrates was attributed to his son Draco.
There may, however, be some confusion in the Suda, and it is possible that these three physicians (by the name of Draco) are not all distinct persons.