Prince Keqin of the Second Rank, or simplyPrince Keqin, was the title of a princely peerage used in China during the Manchu-led Qing dynasty. 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. The first bearer of the title was Yoto, a grandson of Nurhaci, the founder of the Qing dynasty. In 1636, he was awarded the title "Prince Cheng of the First Rank" by his uncle Huangtaiji, who succeeded Nurhaci as the ruler of the Qing Empire. However, he was subsequently demoted for committing offences. After his death, he was posthumously honoured with the title "Prince Keqin of the Second Rank". Yoto's son and successor, Luoluohun, inherited the peerage as "Prince Yanxi of the Second Rank". The peerage was renamed again to "Prince Ping of the Second Rank" when it was passed on to Luoluohun's son, Luokeduo. During the reign of the Qianlong Emperor, the peerage was restored to its former name, "Prince Keqin of the Second Rank", and awarded "iron-cap" status. It was passed down over 13 generations and held by 17 persons – one as Prince Cheng, one as Prince Yanxi, six as Prince Ping, and nine as Prince Keqin.
Members of the Prince Keqin / Prince Cheng / Prince Yanxi / Prince Ping peerage
Yoto, Daišan's eldest son and Nurhaci's grandson, awarded the title Prince Cheng of the First Rank in 1636 but was demoted in the same year to a beile, demoted further in 1637 to beizi but restored as a beile in 1638, posthumously honoured as Prince Keqin of the Second Rank in 1639
* Luoluohun, Yoto's eldest son, held a beile title from 1639 to 1644, held the title Prince Yanxi of the Second Rank from 1644 to 1646, posthumously honoured as Prince Yanxijie of the Second Rank
** Luokeduo, Luoluohun's eldest son, held the title Prince Yanxi of the Second Rank from 1646 to 1651, became Prince Ping of the Second Rank from 1651 to 1682, posthumously honoured as Prince Pingbi of the Second Rank
*** Na'ertu, Luokeduo's fourth son, held the title Prince Ping of the Second Rank from 1683 to 1687, stripped of his title in 1687
*** Na'erfu, Luokeduo's sixth son, held a beizi title from 1685 to 1687, held the title Prince Ping of the Second Rank from 1687 to 1701, posthumously honoured as Prince Pingdao of the Second Rank
**** Na'ersu, Na'erfu's eldest son, held the title Prince Ping of the Second Rank from 1701 to 1726, stripped of his title in 1726
***** Fupeng, Na'ersu's eldest son, held the title Prince Ping of the Second Rank from 1726 to 1748, posthumously honoured as Prince Pingmin of the Second Rank
****** Qingming, Fupeng's son, held the title Prince Ping of the Second Rank from 1749 to 1750, posthumously honoured as Prince Pingxi of the Second Rank
***** Fuxiu, Na'ersu's son, held the title of a beizi
****** Qingheng, Fuxiu's son and Fupeng's adoptive son, held the title Prince Ping of the Second Rank from 1750 to 1778, became Prince Keqin of the Second Rank from 1778 to 1779, posthumously honoured as Prince Keqinliang of the Second Rank
**** Naqing'e, Na'ertu's son, posthumously honoured as Prince Keqin of the Second Rank
***** Yalang'a, Naqing'e's son, held the title Prince Keqin of the Second Rank from 1780 to 1794, posthumously honoured as Prince Keqinzhuang of the Second Rank
****** Hengjin, Yalang'a's son, held the title Prince Keqin of the Second Rank from 1795 to 1799, stripped of his title in 1799
****** Hengyuan, Yalang'a's son, posthumously honoured as Prince Keqin of the Second Rank
******* Shangge, Hengyuan's son, held the title Prince Keqin of the Second Rank from 1799 to 1833, posthumously honoured as Prince Keqinjian of the Second Rank
******** Chengshuo, Shangge's son, held the title Prince Keqin of the Second Rank from 1833 to 1839, posthumously honoured as Prince Keqinke of the Second Rank
********* Qinghui, Chengshuo's son, held the title Prince Keqin of the Second Rank from 1842 to 1861, posthumously honoured as Prince Keqinmin of the Second Rank
********** Jinqi, Qinghui's son, held the title Prince Keqin of the Second Rank from 1861 to 1900, posthumously honoured as Prince Keqincheng of the Second Rank
*********** Songjie, Jinqi's son, held the title Prince Keqin of the Second Rank from 1900 to 1910, posthumously honoured as Prince Keqinshun of the Second Rank
************ Yansen, Songjie's son, held the title Prince Keqin of the Second Rank from 1910–?
