Archelaus was the son of
Perdiccas II and his wife, Simache, who is thought to have been once enslaved by Archelaus' uncle,
Alcetas.
Plato, through his interlocutors in
Gorgias, wrote that Archelaus murdered both his uncle Alcetas and his unnamed seven year old half-brother to gain the throne, but this can not be confirmed. There is evidence to suggest that Cleopatra, the boy's mother and Archelaus' step-mother, was in fact the same person as Archelaus' wife. For example,
Aristotle refers to a wife of Archelaus as Cleopatra in
Politics. Historian
Nicholas Hammond argued that this is only coincidence and that Cleopatra was a common name for girls in Macedonia. However, there is little evidence to suggest that it was actually a frequent name in the fifth-century. Nevertheless, Archelaus had at least one child with a woman called Cleopatra. Archelaus had at least two daughters. Aristotle reports that Archelaus gave his eldest daughter to the king of
Elimea while in a war against the
Lyncestae and the younger to the future ruler
Amyntas II (whom he labels Archelaus' son). The possibility that Argaeus was an
Argaed is likely and, moreover, scholars are able to account for almost all other descendants of
Alexander I. This line of thinking would also have the later royal challenger to
Ptolemy of Aloros and
Philip II, Pausanias (not
the son of
Aeropus II nor
the assassin of Philip), be the son of Archelaus. However, not all historians are in agreement and the claim remains largely unverifiable. Amyntas was most likely the son of Menelaus, Alexander I's second son, but he could have also been the son of Archelaus. The prevailing view, advanced by Hammond, is that Archelaus married his younger daughter to Amyntas or Amyntas' son in order to stave off a future power struggle with the line of Menelaus. The alternative theory holds that the polygamous Archelaus married his son (Amyntas) to his daughter to cement the branch lines: a half-brother and a half-sister. == Reign ==