| 1 | Old English | Æþelþryþ | — |
| 2 | Old English | æþel | homeland, ancestral territory; noble, a person of... |
| 3 | Old English | æþele | noble |
| 4 | Proto-Germanic | aþalaz | noble |
| 5 | Proto-Germanic | aþalą | nature, disposition; nobility, race |
| 6 | Proto-Indo-European | at-al | family, race |
| 7 | Proto-Indo-European | h₂el- | to grow, nourish; beyond, other; to wander, roam |