| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 801 | Rhonwen | Welsh | Fair lance; fair, slender. Welsh form of Rowena: white-haired. | F | |
| 802 | Rhosyn | Welsh | Rose. | F | |
| 803 | Rhun | Welsh | Legendary son of Beli. | M | |
| 804 | Rhuvawn | Welsh | Legendary son of Deorthach. | M | |
| 805 | Rhyawdd | Welsh | Legendary son of Morgant. | M | |
| 806 | Rhychdir | Welsh | From the plow land. | M | |
| 807 | Rhyd | Welsh | From the ford. | M | |
| 808 | Rhys | Welsh | Ardour; rashness. | M | |
| 809 | Rice | Welsh | Ardent. | M | |
| 810 | Romney | Welsh | Dwells near the curving river. | M | |
| 811 | Rowena | Welsh | Variant of Rhonwen: Fair lance; fair, slender. Welsh form of Rowena: white-haired. | F | |
| 812 | Rumenea | Welsh | Dwells near the curving river. | M | |
| 813 | Ryn | Welsh | Ruler. | M | |
| 814 | Sadwm | Welsh | Welsh form of Saturn 'god of the harvest'. | M | |
| 815 | Saer | Welsh | Carpenter. | M | |
| 816 | Saeth | Welsh | Arrow. | F | |
| 817 | Saffir | Welsh | Sapphire. | F | |
| 818 | Saith | Welsh | Seven. | M | |
| 819 | Sarff | Welsh | Snake. | F | |
| 820 | Sayer | Welsh | Carpenter. | M | |