What does the word "Qiang" mean when it is pronounced as a surname?

Qian surname has three sources:

1, from the surname Jiang, is a descendant of Emperor Yan in ancient times. In the Spring and Autumn Period, there was a man named Gongsun Qiang, and his descendants took their ancestors' names as their strong surnames.

Last name, called Qiang surname. Dr. Zheng's surname is Qiang, that is, his grandson. From then on, his surname is Qiang.

2. Clan surnames in history are descendants of the Yellow Emperor. The great-grandson of the Yellow Emperor was named Yujiang, and his descendants took Xinjiang as their surname. Because ancient Xinjiang was similar to the Qiang nationality, it was later changed to the Qiang nationality.

3. It is a branch of ethnic minorities. For example, during the Sixteen Kingdoms period, the descendants of Fu Jian in the former Qin Dynasty had strong surnames. During the Three Kingdoms period, Shu had a strong end, and its descendants lived in Lueyang (now Qin 'an County, Gansu Province), also known as Qiang.