Thomas Son Chasuhn was a Korean Catholic martyr born in Chungcheong around 1838. He gained notoriety for his courage when he volunteered to reclaim confiscated church property following the arrest of Bishop Daveluy. Although he intended only to recover these items, his honesty regarding his faith led to his imprisonment. Even while facing severe hardship and limited food during Lent, he maintained strict religious observances until his death in Gongju in 1866.