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
Human men and women will not have a species in their entries. Also, if the surname of the character is the character's species, it was dropped.
If the character is a child, it will be in the description. The child will more than likely be an adult by this time in the Xanth series.
Many species are single gender, so their entries will not mention it. The species are Fury, Muse, basilisk, cenmaid, cenmare, cockatrice, dryad, maenad, sand witch, sandman, and woodwife. Harpies and nymphs are usually female, and fauns are usually male; but there have been a few exceptions that are noted.
In some instances, I have made educated guesses on gender, species, and some birth years.