Feng'en zhenguo gong (; ; ), 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. The title was the seventh highest rank in the extended system of ranks and the fifth inheritable rank.
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. The title could be made perpetually inheritable in case of abolition of the peerage.
The title could be also granted to the son of Prince of the Fourth rank born to Primary Princess Consort of the Fourth Rank.
Princess consort was styled as "feng'en zhenguo gong furen" (å¥ÂæÂ©é®åÂÂ堬夫人), 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 (å¥ÂæÂ©è¼ÂÃ¥ÂÂå ¬, 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.
Daughter born to primary consort of feng'en zhenguo duke was granted a title of Lady of the Third Rank (éÂÂÃ¥ÂÂ). Daughters born to secondary consort of feng'en zhenguo gong was granted a title of sixth rank clanswoman.
The allowance of grace defender duke reached 700 taels of silver and 700 hu of rice.
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.
The following table includes the titles conveying honorifical names.