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Family name Siuman (Siuman ) , in all the world, is a very rare cognomen. The family name Siuman is characteristic of Malaysia, where it is a very rare surname, China, where it is an extremely rare surname, and Brazil. More prevalently, Siuman is the forename as well as the last name.
So, Yau, Yim, Shum, Chan, Chin, Chow, Choi, Pang, Poon, Devi, Jina, Tang, Tong, Fung, Wong, Yuen, Cheng, Chung, Leung, Tsang, Cheung, Wan, Fan, Hui, Tse, Ko, Li, Lo, To, Ng, Ho, Wu, Man, Mak, Moy, Almeida, Mui, Sum, Chu, Koc, Lau, Lam, Law, Lee, Liu, Lui, Tam, Siu, and Springer