Anders Behring Breivik has confessed to killing at least 76 people in the shootings on the island of Utoeya and a bomb attack in the Norwegian capital Oslo.
On Tuesday, Norwegian police named the first four victims, and published the names of a further 13 victims on Wednesday.
The police will continue to release the other names once they have been identified and their families informed.
Of the names released Wednesday, 12 were among the 68 shot dead on Utoeya, the island that was hosting a summer camp run by the youth wing of Norway's ruling Labor Party. Most of the victims were less than 20 years old.
The other victim was one of the eight people killed by Friday's car bomb in central Oslo.
Here is a look at some of the victims lost in last Friday's tragedy.