Author
- Nene1
- Nicholas Trivet1
- Nicholas Upton1
- Nicholas of Salerno1
- Nicolaus Mameranus1
- Nicolaus von Grätz1
- Nicoluccio di Ascoli1
- Nicolò Peranzone1
- Nilus of Sinai1
- Oddo di Biagio1
- Oliver Maillard1
- Order of the Immaculate Conception1
- Orderic Vitalis1
- Orosius1
- Osbern of Gloucester1
- Oswald Corda1
- Ottmar Luscinius1
- Papias1
- Parliament of Great Britain1
- Paul III1