Arnau
- Ana Arnau
- Anau (disambiguation)
- Arau
- Arna (disambiguation)
- Arnau Amalric
- Arnau Bassa
- Arnau Brugués-Davi
- Arnau Cadell
- Arnau Church
- Arnau March
- Arnau Mir de Tost
- Arnau Mir, Count of Pallars Jussà
- Arnau Ramon of Pallars Jussà
- Arnau Riera
- Arnau de Gurb
- Arnau de Palomar
- Arnau de Vilanova
- Arnau of Peralta
- Arnaud (disambiguation)
- Arnault
- Arnauts
- Arnold (disambiguation)
- Arnold (given name)
- B. J. Arnau
- Comte Arnau
- Emanuele Canoura Arnau
- Francesc Arnau
- Frank Arnau
- Hostinné
- Javier Arnau
- Jordi Arnau
- Josep Arnau i Figuerola
- Juan Arnau
- Lucas Arnau
- Narcís Jubany Arnau
- University Hospital Arnau de Vilanova