Faction "Leader" and other titles?

Neverwas - Heavens Tear

i've seen some players running around with titles next to their guild name, such as leader and executor.

my question is can anyone tell me what all the titles are and what they mean? i know what leader is, obviously, but what is executor and some of the others (if there ARE others)?


AND

when you are the leader of a faction, does that leader title automatically show or do you have the option to turn it on and off? i had planned on forming a faction but i really don't like how "leader" appears next to the faction name.