User blog comment:Darth Cenarius/The deaths of Saesee Tiin and Eeth Koth/@comment-5083720-20130322141019/@comment-5083720-20130324123635

Eeth was first said to die when a gunship crashed on Geonosis. The Clone Wars wanted Kolar in the show, but they end up making Eeth.

You can go to http://starwars.wikia.com/wiki/Eeth_Koth and look in the behind the scenes section