This is something new I am toying with. Legacy pages. First here we have the Atom. I would live to do this with other "families" - Black Canary, Hawkman/Woman/Speed Saunder, Wonder Woman, Dr. Fate, etc. Of course some of those are yet to be settled by DC - but hopefully by the end of the year we will have answers on the Hawks and WW/Fury. Anyway, here is the Atom Family - du du du du snap snap :)
Atom
Al Pratt was the first hero in this line. As a college student he was the youngest original member of the Justice Society of America. An active member of the All Star Squadron. The original Atom died during the battle with Extant.
CyclotronTerry Curtis was the villian Cyclotron. Forced to aid the Ultra-Humanite in his plan for world conquest because his daughter was in Ultra's hands. He died a hero.
Terri Rothstein
The daughter of Cyclotron and goddaughter of Al "Atom" Pratt and Danette "Firebrand" Reilly. She was a scientist at NASA. Terri was killed when the terrorist Kobra blew up a plane she was on.
Atom Smasher
First Appearance - All Star Squadron 25, Spt 1983
Albert Julian Rothstein is the daughter of Terri Rothstein and the godson of the Atom. Albert inherited super-human strength as a result of his grandfathers atomic-powered physiology. While a student, and basketball player at UCLA, Albert was an original member of Infinity Inc, using the name Nuklon. He also spent a short time in the Justice League. With the additional abilities to control his size and density he can now grow so he is 15' tall (his actual height and weight are 7' 6" and 297 lbs.). Albert has changed both his costume and name to Atom Smasher in honor of both Atom and Cyclotron as a member of the 21st century Justice Society of America.
Sources
JSA Secret Files & Origins #1 (August, 1999), James Robinson & David S. Goyer