Feng'en zhenguo gong (; ; Mongolian: Хишгийг сахих улсын түшээ гүн), translated as "Grace Defender Duke" or "Duke Who Guards the State by the Grace" or "State Duke of the First Rank", was one of the royal and noble titles of the Qing dynasty. A title was created in 1653 by division of the zhenguo gong title into two ranks following the criterion of sharing Eight Privileges.[1] The title was the seventh highest rank in the extended system of ranks and the fifth inheritable rank.[2]
The title could be granted to the son of Prince of the First Rank born to Primary Princess Consort of the First Rank. The son of Primary Princess Consort of the First Rank could be further promoted until he reached the father's title (iron-cap peerage). The title was usually the lowest possible to inherit in the peerage of the First Rank except of special circumstances. The title could also convey a honorifical name consisting of two characters.[3] The title could be made perpetually inheritable in case of abolition of the peerage.[4]
The title could be also granted to the son of Prince of the Fourth rank born to Primary Princess Consort of the Fourth Rank.[5]
Princess consort was styled as "feng'en zhenguo gong furen" (奉恩鎮國公夫人), which translates to "State Duchess of the First Rank". Often the title was replaced by the term Primary Wife (嫡妻).
Son of the feng'en zhenguo gong was granted a title of feng'en fuguo gong (奉恩輔國公, translated as: "grace bulwark duke" or "State Duke of the Second Rank"). The son of feng'en zhenguo gong born to mistress was given a title being two ranks lower.[6]
Daughter born to primary consort of feng'en zhenguo duke was granted a title of Lady of the Third Rank (鄉君). Daughters born to secondary consort of feng'en zhenguo gong was granted a title of sixth rank clanswoman.[7]
The allowance of grace defender duke reached 700 taels of silver and 700 hu of rice.[8]
The basic allotment of xiangjun reached 40 taels and 40 hu of rice. As most of the ladies of the third rank were married off, the allowance included 40 taels and 5 rolls of fabrics. Xiangjun (title) was allowed to have 4 personal maids and 2 bodyguards.[11]
The following table includes the titles conveying honorifical names.
| 1648 | Grace defender Qinmin duke (奉恩鎮國勤敏公) | Abai | Third son of Nurhaci and lady Joogiya | Line of Abai | [13] | |
| 1655 | Grace defender Kexi duke (奉恩鎮國恪僖公) | Babutai | Sixth son of Nurhaci and Zhenge, lady Giyamuhut Gioro | Line of Babutai | [14] | |
| 1657 | Grace defender Huaiyi duke | Masan (瑪三) | Third son of prince Wenjian of the Fourth Rank Gu'ermahun and lady Sailate | Line of Šurhaci | [15] | |
| 1658 | Grace defender Huaisi duke (奉恩鎮國懷思公) | Martu (馬爾圖) | Son of prince Wenjian of the Fourth Rank Gu'ermahun and lady Sailate | [16] | ||
| Wencika (溫齊咯) | Son of Tunqika and lady Wanyan | [17] | ||||
| Grace defender Huaimin duke (奉恩鎮國懷愍公) | Seng'e (僧額) | Second son of prince Wenjian of the Fourth Rank Gu'ermahun and lady Sailate | [18] | |||
| Grace defender Daomin duke (奉恩鎮國悼愍公) | Guonai (國鼐) | Prematurely deceased second son of Prince Huaimin of the Fourth Rank, Sabi and lady Wanggiya | Line of Cuyen | [19] | ||
| 1660 | Grace defender Duanchun duke (奉恩鎮國端純公) | Guogai (國蓋) | Fifth son of Amin | Line of Šurhaci | [20] | |
| 1670 | Grace defender Quehou duke (奉恩鎮國愨厚公) | Gaose (高塞) | Hong Taiji's son by lady Nara | Line of Gaose | [21] | |
| 1673 | Grace defender Chunhe duke (奉恩鎮國純和公) | Tuoketuohui (托克托慧) | Son of Prince Xiangmin of the Fourth Rank Wudahai and lady Niohuru | Line of Murhaci | [22] | |
| 1685 | Grace defender Xiangmin duke (奉恩鎮國襄敏公) | Wasan (瓦三) | Fourth son of Prince Wenjian of the Fourth Rank and lady Nara | Line of Šurhaci | [23] | |
| 1724 | Grace defender Kegong duke (奉恩鎮國恪恭公) | Dengsai (登塞) | Third son of Prince Kexi of the Fourth Rank Terhu and lady Xu | Line of Cuyen | [24] | |
| 1739 | Grace defender Keshun duke (奉恩鎮國恪順公) | Nuo'entuohe (諾恩托和) | 13th son of Prince of the Third Rank Nuoni and lady Irgen Gioro | Prince Keqin | [25] | |
| 1881 | Grace defender Keshen duke (奉恩鎮國恪慎公) | Yixiang (奕湘) | Son of the former Prince of the Third Rank Mianlu and lady Fuca | Prince Guo | [26] |