As a teenager I was fascinated by the hierarchy of Angles and Demons, as well as the many varients of the story of the fall and war in heaven. in a few lexicons and texts there were listings of Angels and Demons, as well as their supposed rank and purpose. While reading these to get a name for an AD&D (original, 1.0 version. None of these wierd versions people play now days) character I was creating, I came across 'Shaftiel'. Sounded kinda cool I thought at the time. But what got me was his supposed purpose/job before the fall. Shaftiel was the Judge of God, and the keeper of the Angel of Death. My teenage self was very impressed by this, and decided to use the name. Been using it ever since, going on over 20 years now. luckily its a pretty rare name to come across, so I usually don't have any issue geting it in any game I am interested in playing.
Little bit of trivia I picked up as a kid (Take that for what its worth lol, kids are not the best at cross checking data ), you can always tell what names are Angels (Demons as well, since they are also Angels) simply by the ending -el. Shafti-el, Micha-el, Gabri-el, Uri-el, Israf-el .... and so on. There are names without the -el, but those are usually either aliases or names from Islam or newer texts.
Shaftiel