An alternative to the no-longer-fresh Molly, the initial 'P' gives Polly a peppier sound, combining the cozy virtues of an old-timey name with the bounce of a barmaid.
Associated with Tom Sawyer's aunt, 'Polly, put the kettle on,' parrots, Polly Peachum, Nirvana and Kinks songs, and the movie Along Came Polly, as well as characters in Noel Streatfeild's Ballet Shoes, C.S. Lewis's The Chronicles of Narnia and now on the Netflix show Orange is the New Black, Polly never achieved the comeback that her cousin did, perhaps because she sounds too Pollyanna-ish. But although she has been off the Social Security list for decades, Polly is Number 457 on Nameberry.
But we'd love to see some new baby Pollys.