| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 781 | Rathtyen | Welsh | Legendary daughter of Clememyl. | F | |
| 782 | Reece | Welsh | Ardent; fiery. | M | |
| 783 | Rees | Welsh | Ardent; fiery. | M | |
| 784 | Reese | Welsh | Ardent; fiery. | M | |
| 785 | Ren | Welsh | Ruler. | M | |
| 786 | Renfrew | Welsh | Dwells near the still river. | M | |
| 787 | Rhan | Welsh | Fate. | F | |
| 788 | Rhawn | Welsh | Coarse long hair. | F | |
| 789 | Rhedyn | Welsh | Fern. | F | |
| 790 | Rheged | Welsh | Legendary father of Gwres. | M | |
| 791 | Rhett | Welsh | Form of Rhys: ardent; fiery. Rhett Butler was hero of Margaret Mitchell's Gone With the Wind. | M | |
| 792 | Rhiain | Welsh | Maiden. | F | |
| 793 | Rhiannon | Welsh | Nymph; goddess; pure maiden. | F | |
| 794 | Rhianwen | Welsh | Comely maiden. | F | |
| 795 | Rhianwyn | Welsh | Comely maiden. | F | |
| 796 | Rhinffrew | Welsh | Dwells near the still river. | M | |
| 797 | Rhioganedd | Welsh | Legendary a prince of Ireland. | M | |
| 798 | Rhisiart | Welsh | Welsh form of Richard 'strong ruler'. | M | |
| 799 | Rhobert | Welsh | Welsh form of Robert 'brilliant renown'. | M | |
| 800 | Rhona | Welsh | Variant of Rhonwen: Fair lance; fair, slender. Welsh form of Rowena: white-haired. | F | |