I understand that in polygamous courts the most important man for a royal wife is her son, but what about the daughters of royal wives? Of their male relatives at court, who is the most important to them?
Royal Daughters
Their father and/or their brother/half-brother (the one most likely to inherit and be the next king). This is the person who will be deciding who she marries (and sometimes IF she marries). Once they are married, then their sons.
Royal daughters are always political tools. Beth Carney has a great article on Alexander's sisters (see end).
One of the issues royal daughters faced was who was important enough to get them. We can look at Alexander's sisters for an idea.
Before he died (in his last 2 years) Philip married two of his daughters: the elder, Kynanna, to his nephew Amyntas (Kynanna's cousin), and Kleopatra (ATG's full sister) to the king of Epiros, Olympias's younger brother (Kleopatra's uncle). In both cases, this was a political choice. The first might have been to keep Amyntas loyal, especially as Philip was planning to leave the country for a while on an extended campaign into Persia. Yes, he'd (probably) have taken Amyntas with him to keep an eye on him, but Amyntas was still a stray Argead for rebellion to center on back home. For Kleopatra, it was to make up for any insult to Olympias at Philip's last wedding (after which, Olympias fled Macedonia along with Alexander).
As for Alexander, early in his reign, he promised the now-widowed Kynanna to his Agrianian ally, King Langaros. (Yes, the guy in Rise.) They were friends, too (apparently). But Langaros died somewhat early into Alexander's Asian campaign, and after that, he didn't offer Kynanna to anyone else. Similarly, when Kleopatra was widowed after the death of Alexandros I of Epiros, he also never promised her to anyone else. For one thing, he needed her to act as regent for her young son, the next king of Epiros.
Thessaloniki was never married at all until after his death, when Kassandros more or less forced her to marry him. WHY explains the reason ATG had kept them all unmarried: Thessaloniki became Kassandros's stepping stone to the kingship. He wasn't an Argead, but his children by her were. Alexander wouldn't have married off his sisters to anyone until/unless he had heirs (preferably more than one) of his own.
Elizabeth Carney, "The Sisters of Alexander the Great: Royal Relics," Historia 37.4: 1988.















