Andrew Seo Seok-bong was the husband of Barbara Ku Seong-yeol who was martyred in 1816 in Daegu. He was also the father-in-law of Francis Choe Bong-han who died in the Daegu prison in 1815. Later, he was known as the maternal grandfather of Pak from Songol (now, Dongcheon-ri, Suji-eup, Yongin-si, Gyeonggi-do) among the Catholics. His place of birth, date of birth and the date he became a Catholic are unknown.
  
  
   Andrew Seo married a widow named Barbara. He moved with his daughter and son-in-law Francis to the Noraesan Christian Village in Cheongsong, Gyeongsang-do (now, Norae 2-dong, Andeok-myeon, Cheongsong-gun, Gyeongbuk) and lived with other Catholics. On Easter Sunday in 1815, he was arrested by the police who broke into the village accompanied by a secret agent, and was taken to Gyeongju.
  
  
   At the Gyeongju military base the chief officer interrogated and tortured Andrew Seo to force him to renounce the Catholic religion. He never yielded. The chief official of Gyeongju ordered that he be taken to Daegu with his wife and son-in-law. In Daegu he was tortured many times and endured everything with great faith in God.
   Andrew Seo Seok-bong was sentenced to death with other Catholics on November 18, 1815 (October 18, by the Lunar calendar). Weakened and exhausted by the punishment, he died a martyr in prison while waiting for his execution. The written sentence that the governor of Daegu pronounced reads as follows:
  
   "Seo Seok-bong and his wife Ku Seong-yeol were so deeply imbued with the Catholic religion, that they would never repent."