| Inge | Woman | Scandinavian Names |
| Ingo | Man | Scandinavian Names |
| Ingrid | Woman | Scandinavian Names |
| Ivar | Man | Scandinavian Names |
| Iver | Man | Scandinavian Names |
| Jaan | Man | Scandinavian Names |
| Jaana | Woman | Scandinavian Names |
| Jarmo | Unisex | Scandinavian Names |
| Jeneve | Woman | Scandinavian Names |
| Jens | Man | Scandinavian Names |
| Jensen | Man | Scandinavian Names |
| Jetta | Woman | Scandinavian Names |
| Johanne | Woman | Scandinavian Names |
| Johannes | Man | Scandinavian Names |
| Jokull | Man | Scandinavian Names |
| Jondor | Man | Scandinavian Names |
| Jorn | Man | Scandinavian Names |
| Jötunn | Man | Scandinavian Names |
| Juhani | Man | Scandinavian Names |
| Kaethe | Woman | Scandinavian Names |