Is Tigger a Disney creation?

Excuse me, but I have a question regarding the origins of a beloved character. Is it true that Tigger, the bouncy, stripes-adorned tiger from the Hundred Acre Wood, was actually conceived and brought to life by the imaginative minds at Disney Studios? Or does his story extend beyond that, with roots in other creative realms? I'm genuinely curious to know if Tigger truly belongs to the Disney universe, or if there's more to his creation than meets the eye.