| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 901 | Rhesus | Greek | King of Thrace. | M | |
| 902 | Rhoecus | Greek | Saved Hamadryd. | M | |
| 903 | Risto | Greek | Christ hearer. | M | |
| 904 | Rodas | Greek | Rose garden. | M | |
| 905 | Sabastian | Greek | Revered. The twin brother of Viola in Shakespeare's Twelfth Night. A third-century martyred centurion who became St. Sebastian patron saint of soldiers. | M | |
| 906 | Sacha | Greek | Variant of Alexander: Defender of men. Alexander the Great was a 4th century Macedonian king for whom the Egyptian city of Alexandria is named. Eight popes and three Russian emperors have been named Alexander. Also means avenger. | M | |
| 907 | Salmoneus | Greek | During Trojan War he pretended to be Zeus. | M | |
| 908 | Sande | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 909 | Sander | Greek | Defender of man. | M | |
| 910 | Sanders | Greek | Defender of man. | M | |
| 911 | Sanderson | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 912 | Sandey | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 913 | Sandie | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 914 | Sandor | Greek | Defender of man. | M | |
| 915 | Sandy | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 916 | Sarpedon | Greek | Killed by Patroclus during the Trojan War. | M | |
| 917 | Saunders | Greek | Defender of man. | M | |
| 918 | Saunderson | Greek | Diminutive of Alexander: Defender of men; protector of mankind. | M | |
| 919 | Sebasten | Greek | Revered. | M | |
| 920 | Sebastian | Greek | Revered. | M | |