A damphyr is also known as a dhampir or Dunpeal, depending on your mythos it can be a half human half vampire hybrid, a female half human half vampire or as the child of a Dunpeal and a human, making it one-third vampire.
D from Vampire Hunter D is an example, being called a Dunpeal in the movies and a dhampir in the books.
The cast of Damphyr - 2008 includes: Marco Iammatteo as Damphyr