| 1 | Spanish | romero | said of a type of pilgrim heading to Rome, or... |
| 2 | Vulgar Latin | romarius | — |
| 3 | Latin | maris | genitive singular of mās; accusative plural of... |
| 4 | Latin | mare | sea; ablative singular of mās |
| 5 | Proto-Italic | mari | sea |
| 6 | Proto-Indo-European | móri | sea; standing water |
| 7 | Proto-Indo-European | mer- | to die; to disappear; sea, lake, wetland |