This was during the Thirty Years War, about 1618-48, which was an extremely destructive war, with parts of Germany loosing 50% of the population. This war has aspects of both a civil war, and a religious war between Protestants and Catholics. If you find church registers of this time period you are indeed lucky, and those of this early period often do not provide much detail, not to mention being quite difficult to read.
I have seen one church register from this period in the Austria Empire, a Catholic register, and the first page is annotated that it is the first Catholic church register since the Protestants were expelled from that area. The earlier Protestant registers are almost non-existent. Something to consider is the religion of the population was determined by the ruling prince, Duke, or whoever: if the ruler changed religions for any reason (say a Catholic noble replaced a Protestant one), the the people’s religion then changed.
This may be the end of the trail for this family. However, getting back this far is an accomplishment to be proud of.