Zhao Defang (Chinese: 趙德芳; c. 959–981) was an imperial prince of imperial China's Song dynasty. He was the fourth son of Emperor Taizu and the younger brother of Zhao Dezhao.

He was the 3rd great-grandfather of Emperor Xiaozong of Song.

In 976, Zhao Defang had his first official appointment as the Defense Commissioner of Guizhou, which was quickly followed by appointments of Prefect of Xingyuan (興元, today's Hanzhong), Military Commissioner of Shannanxi Circuit (山南西道, around today's Sichuan) and chancellor. In the winter of 978 he was named Grand Commandant of Inspection (檢校太尉). He died in 981 from an unnamed illness at the young age of 23. Emperor Taizong, his uncle, visited his coffin in tears and cancelled imperial court meetings for 5 days to commemorate him.^[1]

• Parents
  • Zhao Kuangyin, Taizu (太祖 趙匡胤; 21 March 927 – 14 November 976)
  • Empress Xiaohui, of the He clan (孝惠皇后 賀氏; 929–958)
• Consorts and Issue:
  • Lady Jiao, of the Jiao clan (焦氏), daughter of Jiao Jixun (焦继勋)
    • Zhao Weixu (趙惟敘; 977–1011), first son
    • Zhao Weixian (趙惟憲; 979–1016), second son
  • Lady Fu, of the Fu clan of Weiguo (卫国符氏), granddaughter of Fu Yanqing (符彥卿)
    • Zhao Weining (趙惟能; 979 – 1008), third son
  • Lady Wang, of the Wang clan of Qinguo (秦国王氏)
  • Lady Li , of the Li clan of Yingchuan (颖川李氏)
  • Unknown:
    • Princess Yongshou (永寿县主)
      • married Cui Congshi (崔从湜)

In popular stories, including the Generals of the Yang Family legends and Seven Heroes and Five Gallants, Zhao Defang is known as the "Eighth Prince" (八王爺) or "Eighth Virtuous Prince" (八賢王), but this character seems to be a "merger" between Zhao Defang and Zhao Defang's cousin Zhao Yuanyan.

The breakdown:

The "Eighth Virtuous Prince" in Seven Heroes and Five Gallants was clearly based on the historical Zhao Yuanyan, who

• was the only paternal uncle during Emperor Renzong's reign
• had conflicts with Empress Dowager Liu
• eventually revealed the secret about the Emperor Renzong's real birth mother (see Consort Li)