Nobility is a state-privileged status which is generally hereditary.  This ruling system (known as feudalism) was once the source of power in the ancient time on Terra. With the expansion to the Stars and beyond it was reborn. It was the solution to the problem of the slow, inflexible behemoth of bureaucracy. The system is based on the exchange of responsibility and power. The ruler delegates some of his power to a his clan or trusted persons. The person answers to the ruler and is the representative of the state in their territory. Many titles were granted as a sign for outstanding accomplishments or as a gift.
- Knight (former title)
- Earl (former title)
- Duke 
Nobility in the Draconis Combine uses distinct titles roughly analogous to those of House Cameron's Peer List. In general the proper Kurita/Japanese titles are used in most ceremonial and formal occasions, while the Cameron usage is used in more common situations. Some of the Japanese variations only came into vogue following a change enacted by then-Coordinator Theodore Kurita in 3057 to assuage the wounded egos of those nobles who resented his ongoing reforms, by 3067 use Daimyo and Shogun had almost totally supplanted their more common variations.
- Lord/Lady (Knight/Lady) - If the title holder is a MechWarrior Samurai is the proper term  
- Shugo (Baron/Baroness)  
- Tozama Daimyo (Count/Countess)  
- Daimyo (Marquis/Marquessa)  
- Shogun (Duke/Duchess)  
Free Worlds League
- Diem 
Magistracy of Canopus
- Frones 
- Duke 
-  'Nobility' entry for Wikipedia
- Star League Sourcebook, p.23
- House Davion (The Federated Suns), p.102
- House Steiner (The Lyran Commonwealth), p.90
- Handbook: House Kurita, p. 117 "Pillar of Gold (Government) - Sociopolitical Structure - Noble Titles"
- Classic BattleTech Companion, p.208
- House Liao (The Capellan Confederation), p.60
- The Periphery, 2nd Edition (sourcebook), p.32
- Handbook Major Periphery, p. 153