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In the entire world, Ruigen (Ruigen ) is an extremely rare unisex first name.
汭根, 瑞亘, 瑞根, 瑞艮, 瑞跟, 芮根, 蕊根, and 锐根
Li, Huang, Jiang, Cheng, Chang, Zhao, Long, Dong, Chen, Song, Zhu, Yin, Yao, Yan, Wen, Luo, Liu, Lin, Guo, Pan, Cao, Yu, Zhang, and Bungcasan