| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 441 | Llara | Welsh | Meek. | M | |
| 442 | Llassar | Welsh | Legendary son of Llassar Llaes. | M | |
| 443 | Llawr | Welsh | Legendary son of Erw. | M | |
| 444 | Llevelys | Welsh | Legendary son of Beli. | M | |
| 445 | LlewelIyn | Welsh | Lion. | M | |
| 446 | Llewellyn | Welsh | Leader. Lion-like. | M | |
| 447 | Llewelyn | Welsh | Variant of Llewellyn: Leader. Lion-like. | M | |
| 448 | Lloyd | Welsh | Grey. One with grey hair. In common use as both a surname and first name. | M | |
| 449 | Lludd | Welsh | From London. | M | |
| 450 | Llundein | Welsh | From London. | M | |
| 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 | |