PLEASE HELP 30 POINTS!!!

What does the phrase "notorious domesticity" mean in the passage below?

GWENDOLEN: Jack?... No, there is very little music in the name Jack, if any at all, indeed. It does not thrill. It produces absolutely no vibrations... I have known several Jacks, and they all, without exception, were more than usually plain. Besides, Jack is a notorious domesticity for John! And I pity any woman who is married to a man called John. She would probably never be allowed to know the entrancing pleasure of a single moment's solitude. The only really safe name is Ernest.

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