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Cognomen Rohong (Rohong ) , globally, is an extremely rare last name. Much more prevalently, Rohong is the forename as well as the last name.
洛宏, 洛洪, 洛红, 洛虹, 洛鸿, 罗宏, 罗泓, 罗洪, 罗红, 罗虹, 罗轰, and 罗鸿