Yes they extrapolate their family history to a time long before
they even exist! 
Anyway in my story, people from the middle-age lady's family
sometimes say that they have 5000+ years history, though that is
quite a stretch.
Of course that is not meaningful. The entire cultural history of
humankind is 10,000+ years old, but so what?
Why is that a bragging right? Especially if I have not learnt
anything from that vast history and haven't expressed a single
cogent insight.
If I am 30 years old - I am 30 years old. A few thousand years of
family history doesn't automatically make me any wiser or
better.