harry potter - Who are these characters at the end of Deathly Hallows, Part 2?

In the process of answering this question, I came across the following screenshot of several children on the Hogwarts Express, during the "Epilogue" scene of Deathly Hallows, Part 2:

With the caveat that I haven't actually seen the movie, I can identify three of these five characters based on intensive research trawling the infamous wikia:

The two boys on the right are clearly James and Albus Potter, Harry and Ginny's two oldest kids:

And the nearest girl on the left is clearly Rose Weasley, Hermione and Ron's oldest:

Obviously this scene is (mostly) a movie invention; the relevant passage from the book only says:

Albus jumped into the carriage and Ginny closed the door behind him. Students were hanging from the windows nearest them. A great number of faces, both on the train and off, seemed to be turned toward Harry.

[...]

Albus, Rose, Hugo, and Lily laughed. The train began to more, and Harry walked alongside it, watching his son's thin face, already ablaze with excitement. Harry kept smiling and waving, even though it was like a little bereavement, watching his son glide away from him...

^{_{Deathly Hallows Epilogue: "Seventeen Years Later"}}

So my question is, who are the other two girls?

It occurs to me that one of them (maybe the black-haired one in the back?) is possibly Bill and Fleur's daughter Victoire, but IMDB doesn't credit her, or any other named characters, and I can't think of any other identified second-generation children who would make sense here.

Is there any official identity given to these characters, or are there other children I've forgotten who could be appearing uncredited?

I'd prefer a statement from either Rowling or the film's writer/director/producers, but anything that identifies these characters (or the actresses, for that matter) is acceptable. Unless it's fanfiction.