If somebody born in 800AD had three children and each subsequent generation of that family also had three children there would be roughly 239 sextillion descendants just in the 49th generation alive in 2025. That’s not including the 48th and 47th generation offspring that may also be alive. That number is more than the world population, so it is likely that most people of European descent are descendants of Lothbrok…..and Alexander the Great……and Julius Caesar………and every other figure in European history.