Prudence, like Hope and Faith, is a Puritan virtue name with a quiet charm and sensitivity that is slowly returning to favor, though it hasn't yet registered on the charts.
The White Album Beatles song Dear Prudence was written for Prudence Farrow, sister of Mia, who was with them in India when studying with the Marahishi Mahesh Yogi, seeking enlightenment.
Prudence Halliwell was one of the three witches on Charmed, sister to Piper and Phoebe.
Caveat: a bit of possible "prude"-baiting during adolescence.
Asset: Sweet nickname Pru/Prue.