User blog comment:AleximMose/Jonathan Harker In The Hellsing Universe/@comment-829174-20100615182027

Note: This is entirely based off of the original novel. If Kouta Hirano was taking history from one of the MANY slightly different movie variations on the story, that could potentially explain a lot. For example: In the 1958 Hammer horror production, Lucy Westenra is called Lucy Holmwood and is engaged to Jonathan Harker instead of Mina Murray, so he could have just eliminated those two from the story.