Dr. Pipt
The Crooked Magician who lives on a mountain to the north, married to Margolotte.
First named in The Patchwork Girl of Oz, ch. 1
That's the Crooked Magician, who is named Dr. Pipt, and his wife Margolotte.
As the books describe them
so very crooked that his legs were as handy as his arms The Patchwork Girl of Oz, ch. 2
Appearances
The Patchwork Girl of Oz (4 of 28 chapters)
Connections from others
Margolotte child of Dr. Pipt 1 chapter
stated in The Patchwork Girl of Oz, ch. 28