- Maze, Randy1
- McGibbon, Donald Bruce, b. 19401
- McManus, John1
- Milne, Wesley A., b. 19231
- Monteagle of Brandon, Thomas Spring-Rice, Baron, 1790-18661
- Moss, Graham, 1947-1
- Northwick, John Rushout, Baron, 1770-18591
- O'Brien, Erin1
- Oakes, Stanley Philip, b. 19191
- Olson, George, b. 19311
- Orr, John Lewis1
- Paine, Sheila C., b. 19261
- Pannekoek, Anton, 1873-19601
- Peacock, Robert S., b. 19291
- Pelham-Clinton, Edward, Lord, 1836-19071
- Perry, Charles, 1807-18911
- Petryk, Jim1
- Phillips, Barry J., b. 19421
- Porta, Rowan1
- Pratt, Will1