Oak

Over time I grow
Decades pass
Generations come
I extend more
Each large branch represents a generation
Every small branch represents the offspring
Each decade that pass
More generations come and go
Sometimes the names will change
But I show where they originate from
I am the tree that never dies
I represent family
I represent each generation of that family
I keep track of their time
As well as their name
As long as they live
They will never let me die
I am the family tree