I think Pooh Bear was known as Mr. Sanders to the child who had him before Christopher Robin received him secondhand : r/DanielTigerConspiracy
Classic Winnie The Pooh Door/ Mr Sanders Tree House / Printable Large Cutout Die Cut Prop / Stand Up Standee Decoration / Digital Download
Disney Canon-Forgotten/Minor Characters #22: Mr. Sanders – The Animation Commendation
Pooh's House | Disney Wiki | Fandom
London, UK. 4th Dec, 2017. Playing outside Mr Sanders House - Winnie-the- Pooh: Exploring a Classic exhibition: Winnie-the-Pooh's Poohsticks Bridge and Hundred Acre Wood brought to life at the Victoria & Albert Museum.