Zachary Zatara
Zachary Zatara is a fictional character in the DC Universe. Zachary is a descendant of the Homo Magi just like his cousin Zatanna and uncle John Zatara. He first appeared in "Teen Titans (vol. 3)" # 34, and was created by Geoff Johns and Tony Daniel.
Warlock of YS
The Warlock of Ys is a fictional DC Comics Silver Age Zatanna supervillain introduced in Green Lantern Vol. 2 #42 (January 1966) in story titled "The Other Side of the World!". The character was created by Gardner Fox.