Ash and Dawn, as long as they do end up together, I really hope they do, should give birth to my fake Pokémon girl, named "Leeana"
Her hair and voice are also very dawn-like (though her hair is red. like ash's mom).
Also, I think the name "Leeana" mean's "light" in some language? Dawn would make a perfect mother for her. Dawn/Hikari also relate to light.
I made her up before Dawn was made. I think her mom was Misty at first (sadly). Dawn and Ash are way better than Ash and Misty. Dawn should be my fake girl's mom! She'd work so well for her due to her name and personality both matching her so well too :3
That said, Leeana's personality is similar to Dawn's as well. She's quite cheery and confident, like Dawn is. She's more tomboy than girly girl, unlike dawn, though. But still relatable to her. :3 Her hair style and voice also match well. And of course HER NAME.
...Like mother like daughter, right?
EDIT: Of course....the reality;
Leeana is fan made.
However....
Dawn and Ash giving birth to a kid with personality traits/looks/a name that are a shout out to their parents, hopefully a female kid, too, like my fake girl, would be awesome.
That said, even if my girl isn't real, i still will enjoy thinking of her as ash's (and hopefully dawn's too) future kid in my head canon :3 even if they give birth to someone else in reality.