How do girls named Tong get their names?

Tong Huanyan, Tong Wenjie, Tong Xinyue, Tong Liying, Tong Yating, Tong Leping, Tong Jiayi, Tong Zhangzongwei, Tong Xuanyi and Tong Siyang.

Tong Xintian, Tong Ruishu, Tong Jueyan, Tong Xiaoran, Tong Zifang, Tong Chuqi

Tong Ying, Tong Hua, Chen Tong, Tong Yan, Tong Ning, Tong Yuan, Tong Chan, Tong Shan, Tong Yue.

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