The roles of Nobles, Lesser Nobles and Peasant Nobles can be traced to ancient Feudalism.
The nobles were awarded or leased land, called fiefs or fiefdoms, from the king whom they swore their loyalty to. Those who received the fiefs were called the king's vassals. The king was the vassal's lord. The vassals served him by providing him with armies and knights for protection.
In ancient Feudalism the lesser Nobles were the knights who gave military service in return for land. The Knights served as the highest order of military service closest to the King in terms of security.
The peasant Nobles leased lands from the lesser Nobles. They were of the lower class although the had a little bit of authority.
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