Title: Alexander II of Epirus
Content:  Alexander II was a king of Epirus, and the son of Pyrrhus and Lanassa, the daughter of the Sicilian tyrant Agathocles.
Title: Alexander II of Epirus
Content:  He succeeded his father as king in 272 BC, and continued the war which his father had begun with Antigonus II Gonatas, whom he succeeded in driving from the kingdom of Macedon. He was, however, dispossessed of both Macedon and Epirus by Demetrius II of Macedon, the son of Antigonus II; upon which he took refuge amongst the Acarnanians. By their assistance and that of his own subjects, who entertained a great attachment for him, he recovered Epirus. It appears that he was in alliance with the Aetolians. Alexander married his paternal half-sister Olympias, by whom he had two sons, Pyrrhus ΙΙ, Ptolemy ΙΙ and a daughter, Phthia. On the death of Alexander, around 242 BC, Olympias assumed the regency on behalf of her sons, and married Phthia to Demetrius. There are extant silver and copper coins of this king. The former bear a youthful head covered with the skin of an elephant's head. The reverse represents Pallas holding a spear in one hand and a shield in the other, and before her stands an eagle on a thunderbolt. 
Title: Olympias II of Epirus
Content:  Olympias (in Greek Ὀλυμπιάς, ; lived 3rd century BC) was a queen and regent of Epirus. She was daughter of Pyrrhus, king of Epirus and his first wife Antigone. She was the wife of her own paternal half-brother Alexander II. After his death she assumed the regency of the kingdom on behalf of her two sons, Pyrrhus II and Ptolemy; and in order to strengthen herself against the Aetolian League she gave before 239 BC her daughter Phthia in marriage to Demetrius II, king of Macedonia. By this alliance she secured herself in the possession of the sovereignty, which she continued to administer till her sons were grown up to manhood, when she resigned it into the hands of Pyrrhus II. But the deaths of that prince and his brother Ptolemy followed in quick succession, and Olympias herself died of grief for her double loss. Such is Justin's statement: according to another account Olympias had poisoned a Leucadian damsel named Tigris, to whom her son Pyrrhus was attached, and was herself poisoned by him in revenge.
Title: Pyrrhus II of Epirus
Content:  Pyrrhus II (Greek: Πύρρος) was the son of Olympias II and Alexander II of Epirus. He was a brother of Ptolemy and Phthia of Macedon. He ruled as king of Epirus from 242 BC to 237 BC. He had two daughters: Deidamia II who was the last ruler of the Aeacid Dynasty and Nereis who married Gelon of Syracuse.
Title: Epirus
Content:  the expense of rival tribes. The Aeacids allied themselves with the increasingly powerful kingdom of Macedon, in part against the common threat of Illyrian raids, and in 359 BC the Molossian princess Olympias, niece of Arybbas of Epirus, married King Philip II of Macedon. She was to become the mother of Alexander the Great. On the death of Arybbas, Alexander of Epirus succeeded to the throne and the title King of Epirus in 334 BC. He invaded Italy, but was killed in battle by a Lucanian in the Battle of Pandosia against several Italic tribes 331 BC. Aeacides of Epirus, who succeeded Alexander, 
Title: Epirus (ancient state)
Content:  The Molossian Aeacidae dynasty managed to create the first centralized state in Epirus from about 370 BC onwards, expanding their power at the expense of rival tribes. The Aeacids allied themselves with the increasingly powerful kingdom of Macedon, in part against the common threat of Illyrian raids, and in 359 BC the Molossian princess Olympias, niece of Arybbas of Epirus, married King Philip II of Macedon (r. 359–336 BC). She was to become the mother of Alexander the Great. On the death of Arybbas, Alexander the Molossian, uncle of Alexander the Great of Macedon, succeeded to the throne with the title King of Epirus. In 334 BC, the time Alexander the Great crossed into Asia, Alexander I the Molossian led an expedition in southern Italy in support of the Greek cities of Magna Graecia against the nearby Italian tribes and the emerging Roman Republic. After some successes on the battlefield, he was defeated by a coalition of Italic tribes at the Battle of Pandosia in 331 BC.
Title: Neoptolemus II of Epirus
Content:  Neoptolemus II (died 297 BC) was king of Epirus from 302 BC until his death. He was the son of king Alexander I of Epirus and Cleopatra of Macedonia, his maternal grandparents were Philip II of Macedon and Olympias. His maternal uncles included Alexander the Great and Philip III of Macedon. His maternal aunts included Thessalonike and Cynane. Neoptolemus came to the throne after the overthrow of his cousin Pyrrhus in 302 BC. However Pyrrhus returned five years later in 297 BC with the financial and military support of the Egyptian king Ptolemy I. After they initially agreed to rule together as co-kings, Neoptolemus was killed at the behest of Pyrrhus.
Title: Neoptolemus I of Epirus
Content:  Neoptolemus I of Epirus (Νεοπτόλεμος Α' Ηπείρου) (370–357 BC) was a Greek king of Epirus and son of Alcetas I, and father of Troas, Alexander I of Epirus and Queen Olympias. He was the maternal grandfather of Alexander the Great. He claimed he was a descendant of hero Achilles and King Lycomedes, while Emperor Caracalla claimed that he was a descendant of Neoptolemus I. Olympias was originally known as Polyxena and it is possible that Neoptolemus gave her that name.
Title: Molossians
Content:  stories were not doubted. According to Johannes Engels (2010) in the Oxford Companion to Macedonia, genealogical links through the Trojan cycle and other myths strongly connected Epirus with the rest of Greece, precluding serious debate about the Greekness of the Epirotes, including the Molossians. The most famed member of the Molossian dynasty was Pyrrhus, who became famous for his Pyrrhic victory over the Romans. According to Plutarch, Pyrrhus was the son of Aeacides of Epirus and a Greek woman from Thessaly named Phthia, the daughter of a war hero in the Lamian War. Pyrrhus was a second cousin of Alexander the Great. Moreover, Olympias, the mother of Alexander the Great, was a member of this celebrated sovereign house.
Title: Alexander I of Epirus
Content:  Alexander I of Epirus (c. 371 BC – 331 BC), also known as Alexander Molossus (Ἀλέξανδρος ὁ Μολοσσός), was a king of Epirus (343/2–331 BC) of the Aeacid dynasty. As the son of Neoptolemus I and brother of Olympias, Alexander I was an uncle, and a brother-in-law, of Alexander the Great. He was also an uncle of Pyrrhus of Epirus, (Aeacides of Epirus was a cousin of Alexander I and the father of Pyrrhus).

Question: Who is the mother of Alexandros II of Epirus?
Answer: Lanassa.