蔡 is a relatively common Chinese surname (e.g., singer
蔡依林 Jolin Tsai, artist
蔡国强 Cai Guo-Qiang) and corresponds to the Korean surname 채 (Chae). The given name
贤 ('virtuous/wise') is auspicious and very common in both Chinese and Korean naming. In Chinese subtitle corpora
蔡贤 most often appears as a Korean character name.