Another common question in forums is the request for help with Guild Ranks, so the following are some ideas and reference points for some ranks that are out in the world, remember basically any Hierarchy will do as a Rank System. They can be fun, or serious, or Generic – these are just ideas and some may take some tailoring and research of your own
Armed Forces – Check out
Military Ranks where a basic summary and additional links can be found. These will vary from country to country
Eg In summary as per Table from Wiki.
Navies
Admiral of
the Fleet
Admiral
Vice Admiral
Rear Admiral
Commodore
Captain
Commander
Lt. Commander
Lieutenant
Sub-Lieutenant
Warrant Officer
Petty Officer
Leading Rate
Seaman
Armies
Field Marshal
General
Lt. General
Major General
Brigadier
Colonel
Lt. Colonel
Major
Captain
Lieutenant
Sergeant Major
Sergeant
Corporal
Air Forces
Marshal of
the Air Force
Air Chief Marshal
Air Marshal
Air Vice-Marshal
Air Commodore
Group Captain
Wing Commander
Squadron Leader
Flight Lieutenant
Flying Officer
Warrant Officer
Sergeant
Corporal
Law Enforcement
Religion
the Common Churches have a hierarchy amongst their orders
Pagan or old Religions also have ranks
Political and Diplomatic Ranks
Popular Culture or Fictional Ranks
Eg Star Trek
Rank
Star Wars
Role Playing Ranks
Fictional ranks from books Eg Anita Blake Anita Blake Wiki & Rank Definitions
Ulfric
Lupa
lupanar
Lukoi
Hati
Skoll
Eros
Bolverk
munin
Geri
Freyja
Freki
Fenrir
Honor Harrington- Imperial Andermani Navy
Großadmiral (Grand Admiral)
Admiral (Admiral)
Vizeadmiral (Vice Admiral)
Konteradmiral (Rear Admiral)
Kommodore (Commodore)
Kapitän der Sterne (Star Captain)
Fregattenkapitän (Frigate Captain)
Korvettenkapitän (Corvette Captain)
Kapitänleutnant (Lieutenant Captain)
Oberleutnant der Sterne (Senior Star Lieutenant)
Leutnant der Sterne (Star Lieutenant)
Fähnrich der Sterne (Star Ensign)
School
Eg Head Master
Deputy
Head Teachers
Teachers
Students
Janitors
Martial Arts
Pick a Style, and you can you use Belts, or sash colours as symbolic rankings
Sport
Have a fav sport? Use player postions as ranks.
Food Chain / Evolutionary ranks
Eg
Human
Neanderthal
Gorilla
Ape
Monkey
Single Cell organism
Royalty / Titles
Titles
King/Queen
Prince /Princess
Prince in Waiting / Princess in Waiting
Lady / Lord
Duke /Duchess
There are millions of ideas…… and the joy of being GM is picking those titles…
Provided by 
Pugnacious Priest's Warcraft Blog 
When I was forming my old guild, we were a roleplaying guild with a distinct military theme. We relied heavily on British army ranks to when we made our own, with both Commissioned and Non-Commissioned ranks. We also had an Aide de Camp rank for those who were knowledgable and skilled with the game, to recognize them as valuable resources within the guild. It worked well with a guild known as The Regiment.
Good list of references for fledgling guilds!
I’m hoping to build on it, and make it more presentable…. and try and find some less gender specific ranks