Where does “Æsa” come from?

Æsa (Faroese) comes from Old Norse Æsa, from Old Norse Áss, from Proto-Germanic astaz, from Proto-Indo-European h₃ósdos — branch.

Ancestry of “Æsa”, step by step

StepLanguageWordMeaning
1Old NorseÆsa—
2Old NorseÁssa thick pole, main beam (in a house)
3Proto-Germanicastazbranch
4Proto-Indo-Europeanh₃ósdosbranch
Every word from Proto-Indo-European h₃ósdos →Every word from Proto-Germanic astaz →Every word from Old Norse Áss →