Chronologically gifted, Rowan? Nobody gave me them, I had to live them, and to some extent earn them.
'Rich in years' is a term I prefer.

On the river analogy: There are at least three distinct Avon rivers in England, due to 'Afon' being the Saxon (old English) word for river. That's off the top of my head, and I stand to be corrected. Nothing's ever simple, is it.