In Dracula, what is the significance of the title?
Historically speaking, "Dracula" was supposedly named after his father "Dracul" which means "dragon" or "devil" in Romanian. With the additional "a" at the end, you could almost say that his name means, literally, "little devil" or "junior dragon."
The name came about in Trannsylvania in 1431, somewhat official "records" state. Other than the above facts, Dracula is both the main character's name as well as the story title, much like "Frankenstein" by Mary Shelley, or "Batman" in more modern terms. Literary works normally only bear the name of their title character whenever that character is powerful enough to deserve such a credit.