Yip

A person of the Yip Country, the tableland at the south-east of the Winkie Country where Cayke and the Frogman live.

First named in The Lost Princess of Oz, ch. 3

And the skosh not only made the frog very big so that when he stood on his hind legs he was as tall as any Yip in the country, but it made him unusually intelligent, so that he soon knew more than the Yips did and was able to reason and to argue very well indeed.