However, you could use these options:
* ʻOʻahu (ō-ah-hoo): This word means "bear" in Hawaiian, but doesn't specify size. You could add "liʻiliʻi" (lee-ee-lee-ee) meaning "small" or "little" before it to get liʻiliʻi ʻOʻahu.
* Keiki ʻOʻahu (kay-kee ō-ah-hoo): This uses "keiki" which means "child" and adds "ʻOʻahu" for bear, creating "bear child."
Ultimately, the best way to say "little bear" in Hawaiian would depend on the context and the desired level of formality.