Not who you're responding to, but: My assumption was that the user is the greycat, which is the well-known alias of the programmer Greg Wooledge.

Now that you call it out, I realize that it's probably a mistaken assumption, because Greg spells it "greycat" not "graycat". But it wasn't an unreasonable assumption for HN.

He has discussed his wife as well as being a male in graduate school in the past.