Could you ask the question again, giving a bit more information - eg is this a name or a word, and do you know what language it is in? At the moment I can find a name 'Jetaun' or a Tibetan word, Jetsun, which is a respectful title meaning ' revered' or similar; this title is given to some teachers of Buddhism. But if that's not what you're looking for, please try again and give all the information you can.