Udaltsov
Udalzow (female form Udalzowa ) is a Russian surname for the following people:
- Anastassija Olegowna Udalzowa (* 1978), Russian opposition politician
- Nadeschda Andrejewna Udalzowa (1886–1961), Russian painter
- Sergei Stanislawowitsch Udalzow (* 1977), Russian opposition politician
- Sinaida Vladimirovna Udalzowa (1918–1987), Soviet Byzantine scholar, mediaevalist and university professor