How many descendants?

Starting with Christian and his wife and their nine children — If we assume an average of five children per family, and following through five generations, the number of descendants climbs to over 35,000, with 28,000 coming in the fifth generation. Though the fifth generation is less likely to have large families, some of the earlier families were quite large. Either way, it's likely Christian Ries now has 20,000–30,000 descendants scattered across the country.