Where does “eldo” come from?

eldo (Old English) comes from Proto-Germanic alþį̄, from Proto-Indo-European h₂eltós, from Proto-Indo-European h₂él- — to grow, nourish.

Ancestry of “eldo”, step by step

StepLanguageWordMeaning
1Proto-Germanicalþį̄oldness, eld; period of life or time, age; olden...
2Proto-Indo-Europeanh₂eltós—
3Proto-Indo-Europeanh₂él-to grow, nourish
Every word from Proto-Indo-European h₂él- →Every word from Proto-Indo-European h₂eltós →Every word from Proto-Germanic alþį̄ →