I've often thought about that it that way.

However, it is conflicting with the thought of Van Helsing being a man of science, medicine, and the unexplained / supernatural - and combining that with whatever spiritual or religious beliefs he has.

Didn't Van Helsing (can't remember exactly but am remembering as so - please tell me if I'm wrong) acknowledge Dracula's and Mina's timeless pull to one another? That Mina was Elisabeta reincarnated? That would conflict with his (assuming) ancestor's thought that she was damned to hell for suicide and that the two of them couldn't unite in heaven because of it.

Now come to think of it, it still could be true that they are ancestors - Dracula and Mina/Elisabeta were only reunited in mortal life, and Dracula died. Will they be reunited again? Up for debate.