| Roslyn | | RAHZ-lin | English | |
| Ross | | RAWS (English) | Scottish, English | |
| Rostam | | - | Persian, Persian Mythology | |
| Rostislav | | rahs-tee-SLAHF (Russian) | Russian, Czech, Medieval Slavic | |
| Roswell | | RAHZ-wel | English | |
| Rosy | | ROZ-ee | English | |
| Roul | | - | Medieval French, Medieval English | |
| Rowan | | RO-ən (English) | Irish, English (Modern) | |
| Rowanne | | ro-AN | English (Rare) | |
| Rowena | | ro-EE-nə | English | |
| Rowina | | ro-EE-nə | English (Rare) | |
| Rowland | | RO-lənd | English | |
| Rowley | | - | English | |
| Roxana | | rahk-SAN-ə (English), rok-SAHN-ah (Spanish) | English, Spanish, Romanian, Ancient Greek (Latinized) | |
| Roxane | | rok-SAHN (French), rahk-SAN (English) | French, English, Ancient Greek | |