Q
- Quantum theory - 410
- Quarter, William, 1806-1848 - 20, 76
- Quebec, Diocese of - 95
- Quigley, James Edward, 1855-1915 - 76
- Quigley, P.F. (Patrick Francis) - 87
- Quinlivan, George T. - 508
- Quinn, John B. - 433
- Quirinus, Frater, fl. 1877 - 85
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