St Rose is either Saint Rose of Viterbo or Saint Rose of Lima, the first Catholic saint of the Americas. Given the stories of beauty, riches and the love of rich young men, it is more likely to be Rose of Lima, who was so beautiful that she disfigured herself.
St Barbara was a 3rd century saint, persecuted by her pagan Father.
St Agnes was born to a noble Christian Roman family. When she refused to marry Prefect Sempronius's son he wanted her put to death. Under Roman law, a virgin could not be executed, so Sempronius tried to have her raped. But her hair grew to cover her body and those who tried to rape her were struck blind. Sempronius then ordered her burned to death, but the pyre would not light and she was beheaded instead.