Willie, Willie, Harry, Ste,
Harry, Dick, John, Harry three.
One, two three Neds, Richard Two,
Harry four, five, six, then who?
Edward four, five, Dick the bad,
Harrys twain and Ned the lad.
Mary, Bessie, James the vain,
Charlie, Charlie, James again.
William and Mary, Anna Gloria,
Four Georges, William and Victoria.
It isn't strictly a mnemonic and has nothing whatever to do with flying, but hey,
Dick W