Sybil... and Matthew... :'-( It has been waaaaay too long since I've watched Downton Abbey. If I had watched it recently, I probably would have gotten a perfect score.
Since the other clues asked for names I wondered why you didn't ask for the name of Robert Crawley's mother. Dowager Countess is her title, Violet is her name.
When I read the clue asking for the real name of the head of household, my first thought was Hugh Bonneville until I realized you were simply asking for the character's name. Why not just ask for name of the head of household and his title? Asking for the "real" name implied to me that his title is unreal or false.