Eldi Zankor was a Mazarite female alive in the 22nd century. By 2164 she lead the Zankor Syndicate.
Prior to 2164 her syndicate lost much in the way of personnel and assets when the Mazarite government cracked down on organized crime. With the formation of the United Federation of Planets she allied her organization with the Orion Syndicate as the introduction of Federation law and order would further hamper the Zankor Syndicate.
After a clumsy assassination attempt on Anlenthoris ch'Vhendreni, the Three Sisters leading the Orion Syndicate had Eldi Zankor killed in order to ensure that the trail did not continue from the Zankor Syndicate back to the Orion Syndicate. While that was done it also had the effect of denying the Orion Syndicate access to Zankor Syndicate personnel and assets. (ENT - Rise of the Federation novel: Tower of Babel)