| Jansje | Woman | Dutch Names |
| Jasmijn | Woman | Dutch Names |
| Jeroen | Man | Dutch Names |
| Jesper | Man | Dutch Names |
| Jette | Woman | Dutch Names |
| Jettie | Woman | Dutch Names |
| Joop | Man | Dutch Names |
| Joost | Man | Dutch Names |
| Joren | Man | Dutch Names |
| Joris | Man | Dutch Names |
| Juriaan | Man | Dutch Names |
| Jurrijn | Man | Dutch Names |
| Katen | Woman | Dutch Names |
| Katrien | Woman | Dutch Names |
| Kees | Man | Dutch Names |
| Koen | Man | Dutch Names |
| Kwint | Man | Dutch Names |
| Lambert | Man | Dutch Names |
| Laurens | Man | Dutch Names |
| Laurien | Woman | Dutch Names |