I have a new riddle from the Doctor.

Long ago in Transylvania...
Igor's father was a horrible ogre who lived in a cave deep in the forest. He feasted upon anyone foolish enough to venture into his lair until he fell under the spell of an old witch named Haggis who captured his heart with this incantation:

"Dalv, gnagflow, trom,
Look into my eyes-
Dalv, gnagflow, trom,
Your heart is my prize-"

The ogre immediately fell in love with the old witch and the two were soon married. The creepy couple had three children, all sons, who were each born on Halloween night. The first son was a Vampire, whom they named Vlad. Their second son was a Werewolf, whom they named Wolfgang. The third son was a Zombie. What did they name him?