The length of my life and the day of my death were fated long ago.
No, that’s not a person, but a poem, specifically from the Poetic Edda. The translation online, alas, is a lot more King James-Englishy, and not as wonderfully, poetically succinct:
“To a destined day has mine age been doomed,
And my life’s span thereto laid.”
Poor Skirnir (whose journey this poem is about). Being the servant of Freyr, especially when Freyr’s feeling lovesick, isn’t especially easy.