Albert Pratt, aka Atom (father deceased); Mary James (mother deceased); John Emerson (adoptive father, deceased); Kate Emerson (adoptive mother, deceased); Neal Emerson, aka Doctor Polaris]] (adoptive uncle, deceased)
Grant Emerson was the son of Albert Pratt, the original Atom, but was raised in a foster family. He became the superhero, Damage. He was a member of several superhero teams:
Titans
,
Young Justice
,
Justice Society of America
and
Freedom Fighters.
Grant was killed by the resurrected Jean Loring. As a Black Lantern, he somehow retained his own willpower, and sacrificed himself to destroy the other Black Lanterns.