This is an old Manchu surname with a long history, and it is one of the eight Manchu surnames. The family is huge and there are many people. In the Eight Banners of Manchu in Qing Dynasty, there were not only Mongolian Eight Banners and Han Eight Banners registered, but also their figures. Look up the history of Qing Dynasty, and you can easily find a few famous people. For example, Fei Yingdong, Guangdong, Guizhou, Rong Lu, etc. belong to different flag genera.
Thirdly, the Eight Banners (flag genus) is a historical product of the Qing Dynasty, which has nothing to do with modern people. It is only equivalent to a person's work unit now, and it is the place where the standard-bearer receives his salary. So, you don't belong to any flag.
The Eight Banners disappeared after Xinhai.