Prince Yi (created 1722)

It was also one of the 12 "iron-cap" princely peerages in the Qing dynasty, which meant that the title could be passed down without being downgraded.

He was awarded the title by his fourth brother, the Yongzheng Emperor, who succeeded their father.

Zaiyuan (1816–1861), the sixth Prince Yi, was ousted from power in the Xinyou Coup of 1861 and forced to commit suicide.

Three years later, Zaiyuan's cousin, Zaidun (1827–1890), became the seventh Prince Yi.

The title was then passed down for another two generations to Yuqi (1900–1948) before it was finally abolished after the fall of the Qing dynasty.