"ancestors" and "descendants" in russian language

Children feel Russian language better than adults.
Today I explained to my daughter the meaning of words "предки" ([pretki] "ancestors") and "потомки" ([patomki] "descendants"). Then I asked, "So who are the descendants"? She replied,  "those who will be next."(In russian language "Потом-ки"(descendants) like word "потом"(later, next))
So "ancestors" - who were before (you) "Пред-ки" like word "пред (перед)" = before you.
Well, you see, russian language is a  best understood :)
Artist Nikolai Baskakov
The painting "The grandmother with grandchildren," 1960.