What was the nickname given to the father of Prince Dara?
Shah Jahan Shahab-ud-din Muhammad Khurram (5 January 1592  – 22 January 1666) better known by his regnal name Shah Jahan (Persian: "King of the World"), was the fifth Mughal emperor, who reigned from 1628 to 1658.
Prince Constantine Constantinovich of Russia Prince Constantine Constantinovich of Russia ("Константин Константинович"; 1 January 1891 – 18 July 1918), nicknamed Kostya by the family, was the fourth child of Grand Duke Constantine Constantinovich of Russia by his wife Grand Duchess Elizabeth Mavrikievna of Russia.