For other persons with the same name, see Glaucias
Glaucias (Greek: Γλαυκίας; also Glaukos (Γλαῦκος) or Glaucus) was the physician who attended Hephaestion during his final illness and was executed by crucifixion on Alexander's orders.
References
Who's Who in the Age of Alexander the Great by Waldemar Heckel ISBN 978-1-4051-1210-9