There is no word in English that starts the same, it's a pure Dutch sound, but CH comes as close as it gets in English and the beginning of Thierry is practically the same as well. I can't explain it clearer right now. I'm currently travelling, but I'm back home the 26th. I can record me saying Tjaard then and maybe e-mail the recording to you? If you create an account you can send me a private message with your e-mail address or you can just reply it to this message if you don't mind that your e-mail is here.