One of My first Brick Walls. Hence Raises The Question, (How do you find a person when you don't have a last name?)

Lately, I have been researching one my lines my surname. I ran onto  one of my ancestors wife's name but, she had no maiden surname  listed both she, and her husband were born in Dais-Bach Germany. How do you search a German name.  Her nane was  listed as Anna Barbara. Her husband's name was David Busch.

Both born in the 1600's Her in 1652, and him in 1653.