And the same John had his raiment of camel's hair, and a leathern girdle about his loins; and his meat was locusts and wild honey.

-Bible (NewTestament)
St Matthew 3:4.

Jesus answered and said unto them,Go and shew John again those things which ye do hear and see:The blind receive their sight, and the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, and the poor have the gospel preached to them.

-Bible (NewTestament)
St Matthew11:4^5.

And as they departed, Jesus began to say unto the multitudes concerning John,What went ye out into the wilderness to see? A reed shaken with the wind? But what went ye out for to see? A man clothed in soft raiment? behold, they that wear soft clothing are in kings' houses.But what went ye out for to see? A prophet? yea, I say unto you, and more than a prophet.

-Bible (NewTestament)
St Matthew11:7^9.

The next day John seeth Jesus coming unto him, and saith,Behold the Lamb of God, which taketh away the sin of the world.

-Bible (NewTestament)
St  John1:29.

John to the seven churches which are in Asia: Grace be unto you, and peace, from him which is, and which was, and which is to come.

-Bible (NewTestament)
Revelation1:4.

And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And IJohn saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.

-Bible (NewTestament)
Revelation 21:1^2.

There's Carol like a rolling car, And Martin like a flying bird, And Adam like the Lord's First Word, And Raymond like the Harvest Moon, And Peter like a piper's tune, And Alan like the flowing on Of water. And there's John, like John.

-Farjeon, Eleanor
  Then There Were Three,'Boys' Names'.

Now why did you name your baby 'John'? EveryTom, Dick and Harry is named 'John'.

-Goldwyn, Sam(uel) originally  Schmuel Gelbfisz
Attributed. Quoted in Fred Metcalf (ed)  The Penguin Dictionary of Humorous Quotations (1986).

Beneath this slab John Brown is stowed. He watched the ads, And not the road.

-Nash, (Frederic) Ogden
  Good Intentions,'Lather  AsYou Go'.

and I am sweating a lot by now and thinking of leaning on the john door in the 5 SPOT while she whispered a song along the keyboard to Mal Waldron and everyone and I stopped breathing

-O'Hara, Frank
  Of Billie Holiday. Lunch Poems,'The Day Lady Died'.

: I think Jack, for instance, a charming name. :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 theyall, without exception, weremore 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.

-Wilde, Oscar Fingal O'FlahertieWills
  JACKGWENDOLEN1895  The Importance of Being Earnest, act1.