I am trying to write a short story about vampiros and that kind of thing but cant think of any first names and surnames that are not already used in TV programmes and films I've seen. Can anyone give any suggestions???

vampiros are immortal. Decide what era in history your character is originally from and then research names from that time period until tu find one that tu like for him/her. Do that for each character. Don't worry about being original, necessarily (although I would avoid Lestat and Dracula, probably Edward too at this point) just pick something that speaks to you. Bonus - if tu keep the name of the character true to names that may have been dado to a child at the time of their birth, your characters will feel más real.