Quote Originally Posted by Sutekh View Post
XS is part of a Legion in an alternate universe. It lasted a heck of a lot longer than an Elseworld, so she's as much a Legionnaire as anyone, but the Legion of the original continuity didn't have any speedsters.
Well, they weren't on the Legion team, but Barry Allen's kids, the Tornado Twins (Don and Dawn Allen), were a part of the Legion's original continuity.

They were introduced in Adventure 373 in 1968 by Jim Shooter.