Out of all his siblings, Aidan Caohman Vieques Kennedy is one of the more private Kennedys. What we do know is that he is the youngest child of Robert F. Kennedy Jr. and his late ex-wife Mary Richardson. Aidan was born while his father was incarcerated in Vieques Island, Puerto Rico, for trespassing and illegally protesting the 2001 U.S. Navy bombing. After Aidan was born in 2001, Richardson told Tampa Bay Times reporters, "I think that when he is older, the child will understand why he has the name of Vieques and how important it is. And he'll be proud to be a part of that history."

Reflecting on his time in jail in a piece for Outside magazine, RFK Jr. touched on missing his son's birth. "My wife said she thought I was a hero, but if she could see me, she'd peg me as a slacker," he wrote. "She's the only real hero in this, having cared for our five children and produced our sixth, Aidan Caohman Vieques Kennedy, in my absence."

RFK Jr. filed for divorce from Richardson in 2010 after 16 years of marriage. In 2012, Richardson died by suicide. Aidan was only 11 years old. Allegedly, Richardson was distraught over the ongoing custody battle she had with RFK. Jr. regarding their children amid their divorce. Richardson struggled with alcohol addiction and had become dependent on RFK. Jr, whom she called the day before she was found dead.