| Navn | Total | Navn | Total |
|---|---|---|---|
| Jacobsdatter | 29 | Johansen | 26 |
| Jacobsen | 46 | Johansson | 2 |
| Jacobæus | 11 | Johnsdatter | 3 |
| Jakobsdatter | 1 | Johnsdotter | 1 |
| Jakobsdotter | 1 | Johnsen | 20 |
| Jakobsen | 5 | Jokumsen | 4 |
| Jansen | 4 | Jonasdatter | 1 |
| Janssons | 1 | Jonasdotter | 3 |
| Jean-Arselin | 1 | Jonassen | 3 |
| Jensdatter | 162 | Jonasson | 9 |
| Jensen | 384 | Jonsdotter | 30 |
| Jeppesdatter | 11 | Jonsen | 1 |
| Jeppesen | 9 | Jonsson | 18 |
| Jeppsson | 1 | Jordan | 32 |
| Jepsdatter | 1 | Jordhøj | 2 |
| Jepsen | 4 | Josvasdatter | 1 |
| Jespersen | 5 | Juhl | 5 |
| Jessdatter | 1 | Juncker | 1 |
| Jessen | 2 | Jung | 1 |
| Jestrup | 1 | Junge | 29 |
| Joachim | 9 | Jurgensen | 1 |
| Jochumsdatter | 4 | Justesen | 1 |
| Jochumsen | 9 | Juul | 4 |
| Johannesdatter | 6 | Jønsdotter | 28 |
| Johannesen | 15 | Jønsson | 30 |
| Johansdatter | 6 | Jørgensdatter | 49 |
| Johansdotter | 8 | Jørgensen | 97 |