The Duke Yansheng, literally "Honorable Overflowing with Wisdom", sometimes translated as Holy Duke of Yen, was a Chinese title of nobility. It was originally created as a marquis title in the Western Han dynasty for a direct descendant of Confucius.

The nobility of China represented the upper strata of aristocracy in premodern China, acting as the ruling class until c. 1000 CE, and remaining a significant feature of the traditional social structure until the end of the imperial period.