學界多認為金朝「郎君」是對金代的「宗室」、「皇族」、「金朝完顏氏男性皇族」的稱呼。其實不然，在金朝被稱為「郎君」者並非全部是「宗室」，也包括不少非宗室貴族人員。實際上，金朝「郎君」的含義主要有兩個，一是人們對一些宗室及非宗室等貴族青年男子的稱呼；二是指在尚書省等任職的從事護衛、稽查案牘、管理紙筆以及聽從尚書省隨時差遣之事的官吏之称。

In the academic circle most scholars regard the “LangJun” （郎君）in Chin
Dynasty as a term to address the member of a royal family or the rank for male nobility title with the surname of “Wanyan”（完顏）. This is incorrect. In Chin Dynasty, some people who were not royals could also be addressed as “LangJun”. Actually, in Chin Dynasty there were mainly two kinds of meaning for “LangJun” in Chin. One is the address for those noble young men whether they were from royal families or not; the other is for those officials in “Shangshu Sheng”（尚書省）or royal palaces who served as guards, documents inquisitors, in charge of stationery, or who served on a regular basis.