Ilia (Georgian: ილია; Russian: Илья Георгиевич, Iliya Georgiyevich), also known as Elizbar (ელიზბარი), (2 September 1790 – 18 July 1854) was a Georgian prince royal (batonishvili), a son of George XII, the last king of Kartli and Kakheti, by his second marriage to Mariam Tsitsishvili. After the Russian annexation of Georgia in 1801, Ilia accompanied her mother into exile to Russia. He then received military training and served in the Russian army, fighting with distinction at the battle of Borodino against the French in 1812 and retiring with the rank of colonel in 1823. He had 13 children of his marriage with Princess Anastasia Obolenskaya and his descendants, bearing the surname of Gruzinsky, have survived in the 21st-century Russian Federation.
Prince Ilia was born in Tbilisi in 1790 as the fifth child of the then-crown prince George and his second wife Mariam née Tsitsishvili in the lifetime of his grandfather, King Heraclius II. Ilia was 10 years old when his father died in December 1800 after two years of a troubled reign. In the ensuing succession crisis, Ilia's elder half brother and regent for the vacant throne, David, vied with Heraclius II's son, Iulon. The situation was exploited in 1801 by the Russian Empire to make annexation of Kartli and Kakheti, the eastern Georgian kingdom, followed by the deportation of the Georgian royal family to Russia proper. In 1803 Ilia himself witnessed the killing of the Russian general Ivan Lazarev by his mother, Queen Dowager Mariam, when Lazarev tried to force her out of her bedroom for resettlement in Russia. Mariam and her children were eventually deported to Russia, where Mariam was confined to a monastery. Ilia was accepted in the Page Corps for military training.