Search Welsh Baby Names
| # | Name | Origin | Meaning | Gender | Save |
| 451 | Llwybyr | Welsh | Legendary son of Caw. | M |  |
| 452 | Llwyd | Welsh | Legendary son of Kil Coed 'one with gray hair'. | M | |
| 453 | Llwydeu | Welsh | Legendary son of Nwython. | M | |
| 454 | Llwyr | Welsh | Legendary son of LIwyryon. | M | |
| 455 | Llyn | Welsh | From the lake. | M | |
| 456 | Llyr | Welsh | From the sea. | M | |
| 457 | Llyweilun | Welsh | Lion. | M | |
| 458 | Luc | Welsh | Welsh form of Luke 'light'. | M | |
| 459 | Lug | Welsh | Welsh form of Luke 'light'. | M | |
| 460 | Lyn | Welsh | Diminutive of Llewellyn: Leader. Lion-like. | M | |
| 461 | Mabon | Welsh | Legendary son of Modron. | M | |
| 462 | Mabsant | Welsh | Legendary son of Caw. | M | |
| 463 | Madawc | Welsh | Beneficent. | M | |
| 464 | Madawg | Welsh | Legendary son of Teithyon. | M | |
| 465 | Maddoc | Welsh | Beneficent. | M | |
| 466 | Maddock | Welsh | Beneficent. | M | |
| 467 | Maddockson | Welsh | Son of Maddock. | M | |
| 468 | Maddocson | Welsh | Son of Maddock. | M | |
| 469 | Maddog | Welsh | Beneficent. | M | |
| 470 | Maddox | Welsh | Son of Maddock. | M | |
| 471 | Madoc | Welsh | Fortunate. Beneficent. | M | |
| 472 | Madog | Welsh | Beneficent. | M | |
| 473 | Mael | Welsh | Legendary son of Roycol. | M | |
| 474 | Maelgwyn | Welsh | Prince of the hounds. | M | |
| 475 | Maelwys | Welsh | Legendary son of Baeddan. | M | |
| 476 | Mallolwch | Welsh | Legendary king of Ireland. | M | |
| 477 | Manawydan | Welsh | Legendary son of LIyr. | M | |
| 478 | March | Welsh | Legendary son of Meirchywn. | M | |
| 479 | Marvin | Welsh | Variant of Mervyn: Form of Merlin: From the sea fortress. | M | |
| 480 | Marvyn | Welsh | Variant of Mervyn: Form of Merlin: From the sea fortress. | M | |
| 481 | Mathias | Welsh | Gift of God. | M | |
| 482 | Mawrth | Welsh | Welsh form of Mars, god of war. | M | |
| 483 | Medyr | Welsh | Legendary son of Medyredydd. | M | |
| 484 | Meilyg | Welsh | Legendary son of Caw. | M | |
| 485 | Meirion | Welsh | Name derived from the old county of Merionethshire. | M | |
| 486 | Menw | Welsh | Legendary son of Teinkaedd. | M | |
| 487 | Mercher | Welsh | Welsh form of Mercury, messenger of the gods. | M | |
| 488 | Meredith | Welsh | Guardian of the sea. Great chief. This name can be given to children of either gender, but is more common among girls. | M | |
| 489 | Meredydd | Welsh | Guardian of the sea. | M | |
| 490 | Meridith | Welsh | Guardian of the sea. | M | |
| 491 | Merlin | Welsh | Hawk. From the sea fortress. In Arthurian legend, Merlin Ambrosius was adviser/mentor to King Arthur. | M | |
| 492 | Merlyn | Welsh | Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor. | M | |
| 493 | Merrick | Welsh | Dark-skinned; A Moor. Form of Maurice. | M | |
| 494 | Merrion | Welsh | Variant of Meirion: Name derived from the old county of Merionethshire. | M | |
| 495 | Merry | Welsh | Diminutive of Meredith: Guardian of the sea. Great chief. This name can be given to children of either gender, but is more common among girls. | M | |
| 496 | Merv | Welsh | Diminutive of Mervyn: Form of Merlin: From the sea fortress. | M | |
| 497 | Mervin | Welsh | Variant of Mervyn: Form of Merlin: From the sea fortress. | M | |
| 498 | Mervyn | Welsh | Form of Merlin: From the sea fortress. | M | |
| 499 | Merwyn | Welsh | Form of Merlin. | M | |
| 500 | Meurig | Welsh | Dark-skinned; A Moor. Form of Morris. | M | |