Another one that comes to mind: -atos.
Example taken from a papyrus in hellenistic Egypt:
Theon, son of Theon writes a letter to his father and signs it with "Theonatos". The
German translation of the letter uses a diminutive Form, so I am assuming that -atos is yet another form of diminutive.
A famous example is Leonnatos, son of Anteas, one of
Alexander's generals.