Rassoul Magomedov, whose family is also from Dagestan, recognised his 28-year-old daughter Mariam from a photograph published on the internet and sent to him by friends via his mobile phone, Novaya Gazeta newspaper said.
The other woman behind the 29 March attacks has already been identified by officials as the 17-year-old widow of an Islamist militant from the troubled Dagestan region in the North Caucasus.
Russian prosecutors confirmed on Friday that Dzhennet Abdurakhmanova had blown herself up at the Park Kultury metro station.
