King Merlin of Human Xanth is a man from Xanth then England in Mundania. He was first mentioned in Roc and a Hard Place.
Merlin is the husband of Tapis and father of Jonathan, Taplin, and Merara.
Merlin was the first King of Human Xanth. He lead the women of Xanth in killing their rapist husbands from the Third Wave. They and he brought in better men, the Fourth Wave. He abdicated and went to Mundania to help King Arthur Pendragon.
Novels: Roc and a Hard Place, The Dastard, Ghost Writer in the Sky