That's right. And contrary to what many people say, Dracula isn't Vlad Tepes in the original novel, but rather a descendant
Right it in fact does say this
Who was it but one of my own race who as Voivode crossed the Danube and beat the Turk on his own ground? This was a Dracula indeed! Woe was it that his own unworthy brother, when he had fallen, sold his people to the Turk and brought the shame of slavery on them! Was it not this Dracula, indeed, who inspired that other of his race who in a later age again and again brought his forces over the great river into Turkey-land; who, when he was beaten back, came again, and again, though he had to come alone from the bloody field where his troops were being slaughtered, since he knew that he alone could ultimately triumph! (Chapter 3, pp. 19)
So this Lead one to think that it is his own race so it could be an ancestor. how ever then this is said
He must, indeed, have been that Voivode Dracula who won his name against the Turk, over the great river on the very frontier of Turkey-land. (Chapter 18, pp. 145)
Then in Chapter 25 Both Mina and van helsing both talk about if the count was the same person that battled the turks, or it was one of his one of his race, that again could be an ancestor.
Its also worth noting that to stoker came across the name Dracula, when he was look at Romanian history, and picked this name the F****** bad name Count Wampyr. Also there was never in talk of Vlad III in his notes on the book.
So what i take from this is that, he wanted to the keep Count Dracula separate from Vlad III. But at the same time keep some mystery. So i have to say that i always saw him as the same, but its one of thsoe things thats never been confirmed.