Catherine of Si·en·a 
(sē-ĕnə, syĕnä), Saint 1347-1380.
(sē-ĕnə, syĕnä), Saint 1347-1380. Italian religious leader who mediated a peace between the Florentines and Pope Urban VI in 1378.
- Rodgers
- Rodin
- rodman
- Rodney George
- Rodney Robert
- Rodolfo Guglielmi.
- rodomontade
- Rodrigo Borgia.
- Rodrigo Díaz de Vivar.
- roe
- Roebling
- roebuck
- roe deer
- roentgen
- Roentgen
- roentgenium
- roentgenize
- roentgeno-
- roentgenogram
- roentgenograph
- roentgenographic
- roentgenographically
- roentgenography
- roentgenologic
- roentgenological