names origin: celtic
| Name | Meaning | |
| Pendaran | Meaning unknown... | More... |
| Perth, pert | From the thorn-bush thicket... | More... |
| Phelan | Wolf... | More... |
| Powell | Son of Howell... | More... |
| Pryderi | Care... | More... |
| Pwyll | Myth name (lord of Annwn)... | More... |
| Quin, quinn | Wise... | More... |
| Regan, reaghan | Nobility... | More... |
| Regan, reghan, reagan, re | Regal... | More... |
| Rhiannon | Myth name (daughter of Hefeydd)... | More... |
| Rivalin | Meaning unknown... | More... |
| Ronan | Oath... | More... |
| Ronat | Seal... | More... |
| Rowena | White, comely... | More... |
| Roy | Red-haired... | More... |
| Sativola | Name of a saint... | More... |
| Sawyer | Cuts timber... | More... |
| Scilti | Legend name (messenger of Arthur)... | More... |
| Selma | Comely... | More... |
| Setanta | Myth name (son of Sualtam)... | More... |
| Sheridan | Untamed... | More... |
| Sidwell | Meaning unknown... | More... |
| Sloan, sloane | Fighter... | More... |
| Sugn | Myth name (son of Sugnedudd)... | More... |
| Tadhg | Myth name (a prince of Munster)... | More... |
| Taliesin | Myth name (a bard)... | More... |
| Tanguy | Fighter... | More... |
| Taran | Meaning unknown... | More... |
| Teague, teaghue | Bard... | More... |
| Tegid | Meaning unknown... | More... |
| Teirtu | Meaning unknown... | More... |
| Teithi | Myth name (son of Gwynham)... | More... |
| Teyrnon, tiernan, tiernay | Regal... | More... |
| Torrey, tory | Lives by the tower... | More... |
| Trahern | Strong as iron... | More... |
| Tremayne, tremaine | From the town encircled by stone... | More... |
| Trevor | Wise... | More... |
| Tuireann | Meaning unknown... | More... |
| Turi | Bear... | More... |
| Twrch, trwyth | Myth name... | More... |
| Uchdryd | Myth name (Crossbeard)... | More... |
| Uisnech, usenech | Meaning unknown... | More... |
| Ula | Sea jewel... | More... |
| Una | White wave... | More... |
| Varden, vardon | From the green hill... | More... |
| Varney | From the alder grove... | More... |
| Vaughn | Small... | More... |
| Venetia | Blessed... | More... |
| Weylin, weylyn | Son of the wolf... | More... |
| Wynne | Fair... | More... |
| Wynne, winnie, wynnie | White or fair... | More... |
| York | Yew-tree... | More... |
| Yseult | Fair... | More... |
| Yspaddaden | Myth name (father of Olwyn)... | More... |
| Zenevieva, zinerva | Pale... | More... |