- Ostoja, Marian1
- Ostrovitianov, K.1
- Overstreet, Bonaro W.1
- Ozolin, D.1
- Padover, Irina1
- Palandt, Otto1
- Palmer, Gretta1
- Paloczi-Horvath, George1
- Pankratova, A. M.1
- Parragi, György1
- Pashin, Sergei1
- Pashkova, Tat'iana1
- Pasternak, Boris1
- Pesoldt, Ferenc1
- Petrik, János1
- Petrov, Evdokia1
- Petrov, Vladimir Mikhaelovich1
- Petruş, Liliana1
- Peyer, Károly1
- Pintér, László1