The group was funded from its origin by Ihor Kolomoyskyi, Cypriot-Ukrainian billionaire business oligarch. Polonsky has been involved in a long-running dispute with oligarch and newspaper magnate Alexander Lebedev. In 2003 he interviewed Russian oligarch Roman Abramovich. His father was an elected chieftain, or oligarch. Khar is the daughter of the powerful oligarch and politician Ghulam Noor Rabbani Khar. Despite this, Abramovich has been accused by his critics as being an oligarch. He replaced business oligarch Roman Abramovich in July 2008. He bought "Kommersant", a newspaper formerly owned by Russian oligarch Boris Berezovsky. The firm's largest client is a company controlled by Viktor Vekselberg, a Ukrainian-born Russian oligarch. Dmytry Firtash is a Ukrainian oligarch who is prominent in the natural gas sector. It is linked to Russian oligarch Yevgeny Prigozhin and based in Saint Petersburg. He is the son of Azerbaijani-Russian oligarch Aras Agalarov, head of the . He has been described as a Russian oligarch. Tymoshenko's critics have suggested that, as an oligarch, she gained her fortune improperly. The first oligarch and his family are murdered by a blue-eyed assassin.