Putin's girls: Who are the daughters of the Russian president

Yekaterina Tikhonova
Yekaterina, 33, known by the family name of her maternal grandmother, Tikhonova, has gone from being a high-kicking "rock’n’roll" dancer to spearheading a major new Russian artificial intelligence initiative.She was formerly married to Russia’s youngest billionaire, Kirill Shamalov, 38, though is now divorced.Known as Katerina, she gained a doctorate from Moscow State University after completing a study on helping cosmonauts and pilots to orientate themselves in difficult conditions.