Yup, and it’s a reasonable assumption. The squirrel is clearly based on Ratatoskr, whether you think it has a Zoan fruit or is Ratatoskr itself.
A cute portmanteau is not a basis for Ragnir being a mythological creature of Norse mythology independent of Devil Fruits or other mechanics.
The owl is a counterexample that shows you shouldn’t rule out the possibility of an Elbaf squirrel, especially one based on a Norse god, being able to live for centuries.
I've not ruled out anything, we just have very different understandings of what makes an assumption reasonable.
Reasonable assumptions should be rooted in reasonable interpretations of context.
Having shreds of it does not make a reasonable foundation of assuming anything. You can't contextualise without context to examine.
The giants even speculated that the owl ate a size-alteration fruit, which has nothing to do with life expectancy. That owl is simply mystical and has natural longevity to begin with.
I have many questions about the owl. You seem to think you already have the answers.
That underlines the difference between what is reasoned and what it isn't.
You have wishful thinking and preference on your part. I don't care what it is.
Elbaph being home to actual mythological creatures isn't an issue for me. We've seen mythological beings outside of the context of Devil Fruits, we just had more to go with it.