Oh, I see. I had forgotten that. They do also work in Emacs and I wouldn't be surprised to learn that their use in Emacs predates Vim.

I’m not sure when Vi[m] got ctrl n/p, but it looks like emacs got it WAY early on: http://ergoemacs.org/emacs/emacs_kb_shortcuts_pain.html

I've been using those commands in Emacs since the late 70s