Germanic 

the article needs to include a self evident basic fact that the dutch as well as other germanic peoples that they are germanic, almost all articles describe what group of people belong to like russians are east slavic or turkmen are turkic and so on, yes the culture is a part of what defines ethic groups but do not think(if youre against that is)ancestry matters, of course it does it is just a basic fact evryone who can something about it know,you cannot for example be russian one year by eating russian food, celebrating russian tradions and speaking russian and then say "oh wait now am a somali by eating somalian food,celebrating traditions and speaking somali" so ancestry is highly relevant idea here and the austrians(not just them) have germanic roots and are part of the ethno-linguistic called germanic peoplesFREESAVELIYtalk