What the British Monarchs Said About Their Children

 1.  George II in reference to his son Frederick

In reference to the marriage that George I favored for his grandson Frederick, George II said, 'grafting my half-witted son on to a mad woman would not improve the breed."  

This quote is from Rex Factor.  I have not found it elsewhere,  

2.  George II's wife Queen Caroline in reference to their oldest son Frederick (who died before his father and whose son was George III)

Queen Caroline stated, "My dear first born is the greatest ass, and the greatest liar, and the greatest canaille and the greatest beast, in the whole world and I most heartily wish he was out of it.  

(She said far worse.  I don't even what to quote.)

3.  George III in reference to his son the eventual George IV

In a letter, King George III referred to the Prince of Wales (George IV) as "a disappointment to his parents."

4.  Queen Victoria in reference to her son the eventual Edward VII

Victoria stated once wrote that he "has no strength of character, no energy or power of will, no industry, and no conscience." She spoke of his spoke of his eventually ascending the throne as "too awful" to contemplate.

Prior to becoming King Edward VIII, he is supposed to have said, “Most people pray to the Eternal Father, but I am the only one afflicted with an Eternal Mother."  No source (time and place) is listed for the quote and some question whether it sounds like something Edward would have said in terms of its tone or content. 

5.  George V in reference to his son the eventual Edward VIII

King George V told one court functionary that should his son Edward become king -- as was inevitable -- he would 'wreck the monarch and the Empire'.   And to Prime Minister Stanley Baldwin, George said, 'After I'm dead the boy will ruin himself in twelve months.'  King  George V once said he hoped Edward would never have children so “nothing will come between…Lilibet and the throne.”