What does Dacula mean?

You're likely thinking of "Dracula," not "Dacula." Dracula is a fictional character created by Irish author Bram Stoker in his 1897 novel "Dracula."

The name itself is thought to be derived from "Dracul," which was a Romanian word meaning "dragon" and was a title given to Vlad III, a 15th-century Wallachian prince who was known for his cruelty. This historical figure, who was also known as Vlad the Impaler, is believed to have inspired Stoker's character.

So, while "Dacula" isn't a real word, "Dracula" is a fictional name that references a real, albeit terrifying, historical figure.