Constantine Bagrationi
Constantine Bagrationi( 1898–1978) was a Georgian royal prince(" batonishvili") of the royal Bagrationi dynasty of Imereti.
He became the head of the House of Bagrationi after the death of Prince George in 1972 and was followed by Prince Irakli Bagrationi, son of Prince Grigol, the male- line descendant of Prince Bagrat, young brother of King Solomon I of Imereti( 1752 – 1784).
Prince Khosro of Imereti
Khosro( died c. 1570) was a Georgian prince of the Bagrationi dynasty of the Kingdom of Imereti, who led an abortive revolt against King George II of Imereti in 1568.
Bagrat IV of Imereti
Bagrat IV( 1565 – died after 1590), of the Bagrationi Dynasty, was a king of Imereti from 1589 to 1590.
According to the mainstream Georgian scholarship, Bagrat was a son of Prince Teimuraz and a grandson of King Bagrat III of Imereti.
Professor Cyril Toumanoff considered Bagrat to have been a son of another Teimuraz, son of Prince Vakhtang of Imereti.
Enthroned through the support of Giorgi II Gurieli, prince of Guria, Bagrat briefly ruled during the civil war in Imereti until being deposed by Simon I of Kartli in 1590.
Constantine Imeretinsky
Prince Konstantine Konstantines Dze Bagration- Imeretinsky( 1827-1885) was a Georgian royal prince(" batonishvili") of the royal Bagrationi dynasty of Imereti.
Son of Prince Constantine of Imereti( 1789- 1844) and Princess Ana Maria Tereza Denis Lopes de Silva.
Grandson of King David II of Imereti.
He married Princess Anna Kotlyarevskaya and had 4 children:
David II of Imereti
David II  (1756 – 11 January 1795), of the Bagrationi Dynasty, was King of Imereti (western Georgia) from 1784 to 1789 and from 1790 to 1791.
He was the son of George IX of Imereti, who had briefly ruled in 1741.
After the death of his cousin, King Solomon I, he became a regent but prevented the rival princes David (the future king Solomon II) and George from being crowned.
With the support of Katsia II Dadiani, prince of Mingrelia, he seized the throne and proclaimed himself king on May 4, 1784.
He attempted to establish a contact with Imperial Russia and to restrict the powers of great nobles.
David's policy drew many leading aristocrats, including the Mingrelian prince Grigol Dadiani, into opposition.
In 1789, King Heraclius II of Georgia sent his army into Imereti and helped David-Solomon to expel David II into Akhaltsikhe in the Ottoman-held Georgian province.
In 1790, he returned with a Turkish force and deposed Solomon II, but was eventually defeated and fled Imereti.
Later, through the mediation of Heraclius, David was allowed to return to Imereti and granted a fiefdom.
Between 1792 and 1794, he attempted, with the Dagestan mercenaries, to reclaim the crown, but suffered a defeat and withdrew from Imereti.
He died of smallpox while in exile at Akhaltsikhe.
Prince Constantine of Imereti (1789–1844)
Constantine ("KonstantineKonstantin Davidovich Imeretinsky") (4 July 1789 – 3 May 1844) was a Georgian royal prince ("batonishvili"), belonging to the Imereti branch of the Bagrationi dynasty.
A son of King David II of Imereti, Constantine was recognized as heir apparent by Solomon II, who had supplanted his father.
Constantine's succession to the throne of Imereti was precluded by the Russian annexation of that country in 1810.
Constantine subsequently entered the Russian Imperial military service, where he rose to the rank of Major-General.
Prince Simon of Imereti
Simon( born 1771) was a Georgian royal prince(" batonishvili") of the Bagrationi dynasty of Imereti.
Simon was a natural son of Prince Bagrat of Imereti and grandson of King Alexander V of Imereti.
He had one son, Rostom, whose descendants, in contrast to the scions of the Imeretian royals, were not recognized in princely rank by the Russian Empire after its annexation of Imereti in 1810.
Instead, they were reduced to the rank of untitled nobility(" aznauri") with the surname of Bagrationi and are mentioned as such in the list of the Imeretian nobility confirmed by the tsar in 1850.
As of 2015, they are the only surviving male- line descendants of the royal house of Imereti.
Their familial village is Gvankiti, in Imereti.
Nino Imeretinsky
Princess Nino Konstantines Asuli Bagration- Imeretinsky( 1807- 1847) was a Georgian royal princess(" batonishvili") of Imeretinsky branch of the royal Bagrationi dynasty of Imereti.
Princess Nino was a daughter of Prince Constantine of Imereti.
In 1825 she married Prince and General of Imperial Russia Ivane Andronikashvili( 1796- 1868) and they had 3 children:
Mikheil Imeretinsky (1843–1892)
Prince Mikheil Konstantines Dze Bagration- Imeretinsky( 1843–1892) was a Georgian royal prince(" batonishvili") of the royal Bagrationi dynasty of Imereti.
Son of Prince Constantine
Imeretinsky.
Prince Mikheil married Princess Olga Mengden( 1852–1911) and had 4 children:
Prince Bagrat of Imereti
Bagrat( 1741–1800) was a Georgian royal prince(" batonishvili") of the Bagrationi dynasty of Imereti.
He was the common ancestor of all male- line descendants of the kings of Imereti, surviving into the 21st century.
Prince Bagrat was a younger of King Alexander V of Imereti by his wife, Tamar née Abashidze.
He was, thus, a younger brother of King Solomon I of Imereti and an uncle of Solomon II, the last reigning monarch of Imereti.
Prince Bagrat was married to Mariam( 1741 – 1820), daughter of Prince Giorgi, Eristavi of Guria.
He had two children:

Question: Who is Prince Constantine Of Imereti (1789–1844)'s paternal grandfather?
Answer: George IX of Imereti