The person is usually funny and talkative. It is normally used for a sirname and it's rare. More often, a Chinese sirname. Jau can be patient but when you go over the limit, the individual can go dangerous in a split second. So beware of what her/his limits are. Jau are also protective over her/his friends and they are extremely defensive. Jau is easily one of the most loyal friends to have but also one that many can potentially fear. It is wise to get on a Jau's good side rather than a bad one.