| 1 | English | Swan | someone connected with Swansea City Football... |
| 2 | English | Swansea | — |
| 3 | Old Norse | Sveinn | — |
| 4 | Old Norse | sveinn | boy, lad; servant, lackey |
| 5 | Proto-Germanic | swainaz | relative; kinsman; young man; herder; herdsman,... |
| 6 | Proto-Indo-European | swé | self |