 There are two known cases of vampires fathering mostly human offspring in the Lumley novels, one was Faether Ferenczy fathering Janos, who at least in his early years was human but with strong esp and a vampires lusts and amorality, and Jasef an old seer in the tribe of the Szagany Lidesci, whose father had been recently vampirized but hadn't yet shown symptoms.Lesser vampiric creatures.Wamphyrii are well known for creating, either deliberately or by accident, lesser vampiric creatures.