Just out of curiosity, does it say within lore how long a Breton's lifespan is? I know some elfs can live up to 1000 years old so was thinking that Breton's may live longer than other human races.

While the the live spans of Altmer are allot more flexible of man and can be greatly extended by a proper standard of living and judicious use of magicka, the live span for the average unassisted Altmer is assumed to be around 200 years.

Bretons being a cross between Altmer and the local Nedes, with more mannish traits then merish are assumed to be on the lower side of their average. So around 120 years.

But with the right magic, i suppose a crafty breton could bump that up a few decades.