Read the following line from The Importance of Being Earnest.

JACK: Well, really, Gwendolen, I must say that I think there are lots of other much nicer names. I think Jack, for instance, a charming name.

Charming most likely means
debonair
eccentric
effeminate
heretical

debonair

In the context of the given line, "charming" most likely means debonair.