Claim: Niko I Dadiani studied in Paris, and upon return to Georgia in the 1860's, he renounced his title as Prince Regent, making him the last Prince of Mingrelia.
Evidence: Niko remained in St. Petersburg, enjoying the favor of the imperial family even after his mother hurried home due to a peasant revolt in Mingrelia in May 1857. Niko Dadiani was then sent for further education in Paris. On his return, Niko, persuaded to accept a fait accompli, renounced his hereditary title of Prince Regnant of Mingrelia on 4 January 1867.