[taejo]

People with such names might adapt them to be pronounceable (I do: my name has an English vowel which doesn't exist in German, and I introduce myself with a German approximation when I'm speaking German). But even the pronounceable version might not have an obvious correspondence with the written name. For example Nguyen might be happy being called [wɪn] rather than [ŋʷĩəŋ], but many English speakers will say something like ['guyɪn].