Encyclopedias, Almanacs, Transcripts, and Maps
- Columba and Pomposa, Ss.
- Columba of Iona, St.
- Columba of Rieti, Bl.
- Columban Fathers
- Columban, St.
- Columbus, Diocese of
- Coma (Koma), Herz
- Comay, Michael Saul
- Comboni Missionaries of the Heart of Jesus
- Comboni, Daniele, Bl.
- Comden, Betty
- Comenius, John Amos (Komenský)
- Comensoli, Gertrude Caterina, Bl.
- Comgall, St.
- Comissiona, Sergiu
- Comité des Delegations Juives
- Comitoli, Paolo
- Comma Pianum
- Commagene
- Commandments, Reasons for