Pyth
- Reic
- Pythagoras
- Rabi , Isidor Isaac
- Rainwater
- Rainwater , (Leo) James
- Raman , Sir Chandrasekhara Venkata
- Ramanujan , Srinivasa Iyengar
- Ramón y Cajal
- Ramón y Cajal , Santiago
- Ramsay , Sir William
- Ramsay, Sir William
- Ramsey
- Ramsey , Norman Foster
- Randall , Sir John Turton
- Randall, Sir John Turton