| 1 | French | postillon | postman; postilion; a French-style hat worn by... |
| 2 | Italian | postiglione | postillion |
| 3 | Italian | posta | mail, post; post office; stakes |
| 4 | Latin | probāre | — |
| 5 | Latin | probō | — |
| 6 | Latin | Probus | — |
| 7 | Proto-Indo-European | pro-bhwo- | being in front, prominent |
| 8 | Proto-Indo-European | pro- | toward, forward |
| 9 | Proto-Indo-European | por- | to give birth; forward, through; going, passage |
| 10 | Proto-Indo-European | per- | before, in front; first; to go through |
| 11 | Proto-Indo-European | pr̥tós | passed , crossed |