My grandfather is Manchu and his surname is Baizu. My ancestral home is Niangnianggou, Xiuyan County, Liaoning Province. What was his last name?

Xiuyan Manchu mostly lived in Changbai Mountain, followed Nurhachi, Huang Taiji and Fu Lin, and worked as a policeman in the Eight Banners. First in Xingjing (now Xinbin), then in Shengjing (now Shenyang), and then moved to Beijing. During the Kangxi period, Shengjing was returned, and Xiuyan was stationed later. There are also some people who originally lived in Wula (now Jilin City). 1678 (the 17th year of Kangxi), with the approval of the king, more than 10,000 soldiers' families moved to Shengjing, incorporated into the "Lu Niu" (the grass-roots organization of the Eight Banners), and then pulled out to cities, hanging the Eight Banners to Xiuyan.

[White] The old surnames of Manchu are: Guarga, Nala, Baijia, Bayala, Ira, Besut, Natala, Zarrary, Nandulu, Sacha, Nata, Bagala, Tarara, Baluth and Sagarra. ...

Personally, I think [Natala's] is the most likely, and my ancestral home is Erdaogou in Changbai Mountain. It's best to check the genealogy, which is the most accurate.