| Ptolemy Ceraunus | |
|---|---|
 Stater of Ptolemy Keraunos | |
| King of Macedon | |
| Reign | 281 – 279 BC |
| Predecessor | Lysimachus |
| Successor | Meleager |
| Born | ca. 319 BC[1] Alexandria |
| Died | January/February 279 BC[1] |
| Spouse | Unknown woman (possibly daughter of Lysimachus)[2] Arsinoe II of Egypt |
| Greek | Πτολεμαῖος Κεραυνός |
| House | Ptolemaic dynasty |
| Father | Ptolemy I Soter |
| Mother | Eurydice, daughter of Antipater |
Ptolemy Ceraunus (‹See Tfd›Greek: Πτολεμαῖος Κεραυνός Ptolemaios Keraunos; c. 319 BC – January/February 279 BC) was a member of the Ptolemaic dynasty and briefly king of Macedon. As the son of Ptolemy I Soter, he was originally heir to the throne of Ptolemaic Egypt, but he was displaced in favour of his younger brother Ptolemy II Philadelphus. He fled to King Lysimachus of Thrace and Macedon where he was involved in court intrigue that led to the fall of that kingdom in 281 BC to Seleucus I, whom he then assassinated. He then seized the throne of Macedon, which he ruled for seventeen months before his death in battle against the Gauls in early 279 BC. His epithet Ceraunus is Greek for "Thunderbolt" and referred to his impatient, impetuous, and destructive character.[3][1]