Conan's mother, Ruth Reardon O'Brien, died on December 12, at age 92, while his father, physician Dr. Thomas O'Brien, died days earlier on December 9, also at their home in Brookline, Massachusetts.

Before he became of late-night TV’s most iconic hosts, Conan O’Brien was one of six siblings growing up in Brookline, Massachusetts. While some of his siblings followed in their mother’s ...