@deavmi
Here are some clues:

"Prior to his incarceration, Reiser created the ReiserFS computer file system, which may be used by the Linux kernel, as well as its attempted successor, Reiser4. In 2004, he founded Namesys, a corporation meant to coordinate the development of both file systems."
"Spouse(s) Nina Reiser (m. 1998; murdered 2006)"

I was using ReiserFS v3 back in my Gentoo days.
@satania@niu.moe