(Note that this list is speculative in several cases and would be disputed by scholars. For example, Hephaestion was probably not named as early as given below. The only complete list of Alexander's bodyguard in the original sources is found in Arrian (6.28.4), upon the extraordinary appointment of Peucestas in Carmania.)
Aristonous, Lysimachus, Peithon, Leonnatus, Perdiccas, Ptolemy of Lagus, Hephaestion, Peucestas.
323
Aristonous, Lysimachus, Peithon, Leonnatus, Perdiccas, Ptolemy of Lagus, Peucestas.
Royal agema
The term somatophylakes is also used to refer to a member of the Royal Hypaspists, the agema, who acted as the King's bodyguard in battle. The Royal Pages would expect to begin their military service in this unit: thus Pausanias, Philip II's assassin was a member of this corps, not one of the Seven Bodyguards.
W Heckel[2] believes that the Ptolemy* given above for 336 BC was not one of the Seven but commander of this unit. He was killed at Halicarnassus in 334 BC and succeeded by Admetus. The latter was killed at Tyre in 332 BC and appears to have been succeeded by Hephaestion.
Heckel, Waldemar. "The 'Somatophylakes' of Alexander the Great: Some Thoughts." Historia: Zeitschrift für Alte Geschichte Bd. 27, H. 1 (1st Qtr. 1978), pp. 224–228.