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Cognomen Shunsu (Shunsu ) , all over the world, is an extremely rare surname. Much more frequently, Shunsu is the forename as well as the last name.
שונשו, 顺素, and 顺苏
Mori, Kono, Ozaki, Masuda, Nakata, Hirose, Onishi, Yamada, Tori-Sei, and Kominami