Names
| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| Lacy | 5 | Lawrence | 1 | León and Castile | 1 | Logan | 1 | Lucy, de | 3 |
| Lacy, de | 11 | Leche | 2 | Leroy | 1 | London | 2 | Lusatia | 5 |
| Lancaster | 4 | Lee | 13 | Lezay, de | 1 | Longespée | 6 | Lusignan | 18 |
| Landen | 1 | Leek | 2 | Lidiard | 2 | Lorraine | 33 | Lutegareshale, de | 1 |
| Langele | 1 | Legassick | 1 | Ligon | 8 | Lotharingia | 8 | Luxembourg | 9 |
| Langston | 1 | Legh | 2 | Limburg | 3 | Louvain | 12 | Lygon | 2 |
| Laon | 3 | Leinster | 1 | Lisle | 1 | Lovingcott | 2 | Lyubech | 2 |
| Laron, de | 1 | Lens | 2 | Lisours | 2 | Lowdham | 1 | - | - |
| Lasborough | 2 | Lenzburg | 1 | Llywelyn | 1 | Luca | 1 | - | - |
| Lavers | 1 | León | 11 | Loches | 1 | Lucy | 2 | - | - |