I can't remember how many seats King Arthur had at his Round Table, but King Edward VI needs eleven at his Aston branch.
By my reckoning, eleven AOEs had received knighthoods between 1934 and 1991. Here they are in chronological order:
Sir Edgar Britten (1934)
Sir Ernest Canning (1936)
Sir William Allport Brockington (1946)
Sir Leonard Parsons (1946)
Sir Henry Thomas (1946)
Sir Harold Charles Templar-Smith (?)
Sir Ivan Stedeford (1954)
Sir Joseph Balmer (1965)
Sir Neville Bosworth (?)
Sir Maurice Shock (1988)
Sir Edward Downes (1991)