List of emperors of the Han dynasty
The Han dynasty was founded by the peasant rebel leader (Liu Bang), known posthumously as Emperor Gao ("r". 202 –195 BC) or Gaodi. The longest reigning emperor of the dynasty was Emperor Wu ("r". 141–87 BC), or Wudi, who reigned for 54 years. The dynasty was briefly interrupted by the Xin dynasty of the former regent Wang Mang, but he was overthrown in 23 AD and the Han dynasty was reestablished by Liu Xiu, known posthumously as Emperor Guangwu (r. 25–57 AD), or Guangwu Di. The last Han emperor, Emperor Xian ("r". 189–220 AD), was a puppet monarch of Chancellor Cao Cao (155–220 AD), who dominated the court and was made King of Wei. In 220 AD, Cao's son Pi usurped the throne as Emperor Wen of Wei ("r". 220–226 AD) and ended the Han dynasty.
Han (Korean surname)
There is a controversy on where Gija is from, which is believed to be from the Chinese Shang Dynasty, Gija as a paternal uncle (or brother) of the last emperor of the Chinese Shang Dynasty, King Zhou, however it is likely that Gija is a Dongyi, a native people in the East of China. Gija's and his descendants were also believed to have the surname Han (韓) as King Jun of Gojoseon the last King of Gojoseon and descendant of Gija claimed himself as the King of Han (한왕; 韓王) with the foundation of Mahan part of the Samhan after fleeing from Wiman. With this it shows that the surname Han may have existed since the time of Gija Joseon or Gojoseon and establishes the Han (韓) clan as the oldest surname in Korea dating back to around 5000 years ago, and to have founded and ruled Gojoseon and Mahan.