Barry Allen

Barry Allen is the son of Judy (née Garrick) Allen, the grandson of Jay Garrick, the brother of Mary (née Allen) West, brother-in-law of Rudy West, uncle of Wally West, and husband of Iris West-Allen. Like his ancestor William Garrick, his grandfather, and his nephew, Barry developed the speedster powers that alpha and beta men in his family can inherit due to whatever genes were activated when William Garrick was struck by lightning in the late 1700's.
Barry was born in Columbus, Ohio to an unnamed man and Judy (née Garrick) Allen and was the brother of Mary, though it is unknown at this time which one of them was older. When Barry presented as a beta, he developed the speedster powers. Sometime between then and 1998, Barry married his wife, Iris West-Allen. They then took custody of his nephew Wally in 1998 after Rudy West, Barry's brother-in-law and Wally's father, killed Mary.
After gaining custody of Wally, Barry often wondered if Wally would develop the speedster powers. When Wally presented as an alpha in 2006 and didn't, Barry thought that Wally wouldn't and that he would be the last of the speedsters, as he and Iris could not have kids. He was proven wrong in May of 2008, however, when Wally did develop the powers after all.