Dawn Allen(Tornado Twins)

Dawn and Don Allen are the twin children of Barry Allen (The Flash) and Iris West-Allen. They were born in the 30th century, and inherited their father's super-speed. Dawn married Jeven Ognats, and they are the parents of Jenni Ognats (XS). Don married Meloni Thawne, and they are the parents of Bart Allen (Impulse).