Gwin

Gwin is the god of death and aging. He is euphemistically referred to as "The Firekeeper", and he is often portrayed around a hearth.

There is a legend that the world can be ended by either seizing his sacred fire as one's own, or by snuffing it out. Other stories say that doing this will give immortality to all in Omnia, but prevent the birth of any new children.

Influence
https://en.wikipedia.org/wiki/Gwyn_ap_Nudd

https://darksouls.fandom.com/wiki/Gwyn,_Lord_of_Cinder