From DTG on Reddit: https://www.reddit.com/r/DestinyTheGame/comments/4eh740/new_dead_ghost_location_rezyl_azzir_war_without/

A 4 month old account with the name of Rezyl Azzir posted the location of the ghost unlocking the Rezyl Azzir grimoire a mere 17 minutes after the update went live... schenanigans.

Anyway, I thought that was a little fun.

I thought that name sounded familiar, and a quick Google search confirmed that a Ghost by that name was found in the Phogoth room back in December. So I suspect the person's account was named after the earlier find.