#1 O'Neill, Thomas, 1951- author of America's hidden corners (LC 80080057)
#2 O'Neil, L. Thomas (Louis Thomas), 1943- author of Towards the life divine (LC 81059598)
#3 O'Neill, Thomas, arranger.
#4 O'Neill, Thomas, Count, author of A concise and accurate account of the proceedings of the squadron ... (LC 2005026162)
#5 O'Neill, THomas, author of Irish uprising.