Here are some of the ranks for different tribes! They are in order from highest to lowest.
Royals
King/Queen: In command, tribe leader. Both mates, but can be one ruler.
Lord/Lady: second in command, take over for King/Queen sometimes. Only about 2-3 of each.
Princes/Princesses: Next leaders, parents are the King and Queen. Only about five or six max.
Elder: Retired from work. Only about five or six, help lead with King and Queen.
Military
Medic: Healer of the tribe. Only one.
Guardian: Fighters and protectors, strongest dragons.
Hunter: Finds food, scouts territory for invaders, fastest dragons.
Smith: Craft armor, weapons, work with iron/steel and jewels.
Alchemist: Scientists, work with potions.
Citizens
Miner: Get ores for Smiths.
Farmer: Gather crops to eat, and herbs for Alchemists.
Mentor: Teach trainees.
Apprentice: Future Guardians, Hunters, Smiths, or Alchemists.
Clutch-Watcher: Watches over hatchlings.
Hatchling: Baby dragons.