I have checked my extensive Hauser family file, and I have no one named Dawson Hauser in it. The best thing to try to find out in order to start looking for European relatives in Switzerland or Germany would be to learn the name of Dawson's father, his immigration date, and his place of residence at the time of his immigration. Without this information, you are facing a formidable brick wall.
Good luck on your continued researches.
Cheers. Rollie Hauser