When Thomas Lyon Purdy was born on 7 October 1854, in Purdys, North Salem, Westchester, New York, United States, his father, Issac Hart Purdy, was 41 and his mother, Mary Willis Lyon, was 33. He married Adelina Josephine Nathan on 19 October 1881, in Connecticut, United States. They were the parents of at least 2 sons and 1 daughter. He immigrated to New York City, New York, United States in 1956 and lived in North Salem, Westchester, New York, United States for about 60 years. He died on 5 April 1923, in Somers, Westchester, New York, United States, at the age of 68, and was buried in Somers, Westchester, New York, United States.