Achternamen
| Achternaam | Aantal |
|---|---|
| Jancic | 1 |
| Jancu | 1 |
| Janecek | 1 |
| Janez | 1 |
| Janezic | 3 |
| Janhsen | 1 |
| Janicki | 4 |
| Janiczak | 2 |
| Janij | 1 |
| Janik | 1 |
| Janissen | 36 |
| Janizewski | 1 |
| Janken | 1 |
| Janknecht | 3 |
| Jankowiak | 1 |
| Janmaat | 3 |
| Janne | 1 |
| Jannenga | 1 |
| Jannes | 4 |
| Janning | 1 |
| Jannink | 1 |
| Jannis | 5 |
| Jannsen | 1 |
| Jannssen | 1 |
| Janosch | 4 |