Lol, I'm up late going bananas trying to find all National Title Record Holders in Singles!
So the following is what I have to add to the list:
J. Ferguson Page (BRITISH) & Oliver Honer (SWISS) hold the record for M-E-N with 11 National Titles respectively!
Also, besides Kristoffer Berntsson, Stephane Lambiel is also one shy of joining the 10 club (aka Carlo Fassi, Nobuo Sato, Bo Mothander, Hans Landh).
Gabriele Seyfert (GER) holds the record for W-O-M-E-N with 10 National Titles!
And Jenna McCorkell & Sarah Meier are both one shy of joining the 9 club (aka Maribel Vinson-Owen, Michelle Kwan, Chen Lu, Midori Ito, Constance Wilson-Samuel, Anne Karin Dehle).
I'm too tired to search for more, but will have another go at it tomorrow.