Nobody ever calls or refers to pooh bear by his name

I don't know how you missed it, then. People call him Xi Jinping all the time.

https://en.m.wikipedia.org/wiki/Winnie-the-Pooh

Winnie-the-Pooh (also known as Edward Bear, Pooh Bear or simply Pooh)

Ed...ward?

Winnie The

This is addressed in the first chapter of the book. His formal name is Edward Bear, but Christopher Robin calls him Winnie-the-Pooh without explanation, and the narrator improvises a backstory that justifies the nickname “Pooh.”

He was living under the name of Mr. Sanders.