If your family has lived in the Deshengmen area from the Qing Dynasty to the present, it belongs to the Zhenghuang Banner, because the Deshengmen area is the defense area of ??the Zhenghuang Banner. If there has been any relocation in the meantime, it's hard to tell.
[Cao] The earliest Chinese surname used by the Manchu people, recorded in "Nancun Shuigonglu" by Tao Zongyi of the Yuan Dynasty: the surname of the Jin people in Aotun was Cao.
Old surnames include: Suochuoluo, Etuo, Melezele, Suojia, Caojia, Caoerjia, Ergenjueluo, Etong, and those who joined the Manchu clan Cao family (Han, Korean), etc.
Although there are many people in the Sochuluo family, most of them are raising red flags. In the Zhenghuang flag, there is only one Zhuhena family who was the first to return from Wula, and the number of people is very small.
Irgenjueluo family is a common surname, and many Irgenjueluo family members who defected from Yehe, Saerhu, Wula, Varka and other places were incorporated into the Zhenghuang Banner.
There are also many Suojia clans in Zhenghuang Banner.
The Etuos are almost all distributed in the Zhenghong Banner, and there are no Zhenghuang Banners.
Almost all the Merzelles are distributed in the Xianghuang Banner, and there are no Zhenghuang Banners.
The other surnames Cao Jia, Cao Erjia and Etong are all minor surnames. Etong clan belongs to Zhengbai Banner. Cao Jia and Cao Erjia were mostly changed from Han surnames incorporated into the Eight Banners.