Tiiu
Tiiu is an Estonian feminine given name and may refer to:
- Tiiu Aro, Estonian physician and politician
- Tiiu Asper, Estonian judoka
- Tiiu Erelt, Estonian linguist
- Tiiu Kera, retired United States Air Force major general
- Tiiu Kirsipuu, Estonian sculptor
- Tiiu Kuik, Estonian fashion model
- Tiiu Kull, Estonian botanist
- Tiiu Levald, Estonian opera singer, pedagogue and music critic
- Tiiu Märss, Estonian geologist and paleontologist
- Tiiu Parmas, Estonian tennis player
- Tiiu Nurmberg, Canadian-Estonian alpine skier