Question: Who is Thessalonike Of Macedon's father-in-law?

Knowledge 1: Thessalonike of Macedon
Thessalonike (352 or 345 – 295 BC) was a Macedonian princess, the daughter of King Philip II of Macedon by his Thessalian wife or concubine, Nicesipolis.History links her to three of the most powerful men in Macedon—daughter of King Philip II, half-sister of Alexander the Great and wife of Cassander. [SEP] Knowledge 2: Cassander
Cassander (Greek: Κάσσανδρος Ἀντιπάτρου, "Kassandros Antipatrouson of Antipatros": c. 355 BC – 297 BC) was king of the Hellenistic kingdom of Macedon from 305 BC until 297 BC, and "de facto" ruler of southern Greece from 317 BC until his death.Eldest son of Antipater and a contemporary of Alexander the Great, Cassander was one of the Diadochi who warred over Alexander's empire following the latter's death in 323 BC.Cassander later seized the crown by having Alexander's son and heir Alexander IV murdered.In governing Macedonia from 317 BC until 297 BC, Cassander restored peace and prosperity to the kingdom, while founding or restoring numerous cities (including Thessalonica, Cassandreia, and Thebes); however, his ruthlessness in dealing with political enemies complicates assessments of his rule.
Knowledge 1: Thessalonike of Macedon
Thessalonike (352 or 345 – 295 BC) was a Macedonian princess, the daughter of King Philip II of Macedon by his Thessalian wife or concubine, Nicesipolis.History links her to three of the most powerful men in Macedon—daughter of King Philip II, half-sister of Alexander the Great and wife of Cassander. [SEP] Knowledge 2: Antipater II of Macedon
Antipater II of Macedon (Greek: ἈντίπατροςΒʹ ὁ Μακεδών), was the son of Cassander and Thessalonike of Macedon, who was a half-sister of Alexander the Great.He was king of Macedon from 297 BC until 294 BC, jointly with his brother Alexander V. Eventually, he murdered his mother and ousted his brother from the throne.Alexander turned to Pyrrhus and Demetrius I Poliorcetes for help, and Demetrius I overthrew Antipater and then had Alexander murdered.Antipater was killed by Lysimachus, after he fled from Demetrius I to Thrace.His wife was Eurydice, his paternal cousin who was a daughter of Lysimachus.
Knowledge 1: Cassander
Cassander (Greek: Κάσσανδρος Ἀντιπάτρου, "Kassandros Antipatrouson of Antipatros": c. 355 BC – 297 BC) was king of the Hellenistic kingdom of Macedon from 305 BC until 297 BC, and "de facto" ruler of southern Greece from 317 BC until his death.Eldest son of Antipater and a contemporary of Alexander the Great, Cassander was one of the Diadochi who warred over Alexander's empire following the latter's death in 323 BC.Cassander later seized the crown by having Alexander's son and heir Alexander IV murdered.In governing Macedonia from 317 BC until 297 BC, Cassander restored peace and prosperity to the kingdom, while founding or restoring numerous cities (including Thessalonica, Cassandreia, and Thebes); however, his ruthlessness in dealing with political enemies complicates assessments of his rule. [SEP] Knowledge 2: Antipater II of Macedon
Antipater II of Macedon (Greek: ἈντίπατροςΒʹ ὁ Μακεδών), was the son of Cassander and Thessalonike of Macedon, who was a half-sister of Alexander the Great.He was king of Macedon from 297 BC until 294 BC, jointly with his brother Alexander V. Eventually, he murdered his mother and ousted his brother from the throne.Alexander turned to Pyrrhus and Demetrius I Poliorcetes for help, and Demetrius I overthrew Antipater and then had Alexander murdered.Antipater was killed by Lysimachus, after he fled from Demetrius I to Thrace.His wife was Eurydice, his paternal cousin who was a daughter of Lysimachus.

Answer: Antipater