Encyclopedias, Almanacs, Transcripts, and Maps
- Our Lady of the Missions, Sisters of
- Our Lady of the Sacred Heart, Daughters of
- Our Lady of the Snow
- Our Lady of the Way, Society of
- Our Lady of Victory Missionary Sisters
- Oury, Gerard
- Ouziel, ben-Zion Meir ?ai
- Ovadia, Nissim J.
- Ovalle, Alfonso de
- Ovariotomy
- Ovchinski, Levi
- Oved, Margalit
- Overberg, Bernard
- Ovid in Christian Culture
- Ovid°
- Ovitz, Michael
- Ovruch
- Ovsay, Joshua
- Owen, Nicholas, St.
- Owensboro, Diocese of