The family of Demetrius II of Georgia was part of the Bagrationi dynasty of the Kingdom of Georgia. Demetrius II (Demetre, or Dimitri; Georgian: დემეტრე, დიმიტრი) was a king of Georgia, reigning from 1270 until his execution by the Mongol Ilkhans in 1289. He was a son of David VII of Georgia by his third wife Gvantsa Kakhaberidze. Demetrius, although a Christian, was polygamous, with three wives, and was survived by nine children, of whom three subsequently ruled as kings of Georgia.
Demetrius, born in 1259, was the second son and third child of King David VII. His mother was David's third wife Gvantsa née Kakhaberidze. He was only 3 or 4 years old when Gvantsa was put to death by the Mongols as a reaction to David's abortive rebellion against the Ilkhan hegemony. David himself died in 1270.
Demetrius had an elder half-brother George, an heir apparent, who died before his father's death in 1268, and an elder half-sister Tamar, whom Demetrius subsequently married off, with great reluctance, to a son of the Mongol official Arghun-Agha. On Arghun's death, Tamar, who despised her marriage, capitalized on her husband's departure from Tbilisi and fled to the mountains of Mtiuleti. She was eventually delivered by Demetrius' powerful minister Sadun Mankaberdeli, a polygamous, who wed her through the intercession of the Ilkhan Abaqa.
The anonymous 14th-century Chronicle of a Hundred Years, part of the Georgian Chronicles, states that Demetrius, previously a pious Christian, allowed himself to come under the influence of the Mongol "bad habits". The young king enjoyed, to the dismay of the Georgian catholicos Nicholas III, no less than three wives, his polygamy becoming the occasion of that prelate's abdication in 1282. At the time of Demetrius' death at the hand of the Mongols in 1289, all three of his wives, as well as their children, were alive.