Where does “Jólaeyja” come from?

Jólaeyja (Icelandic) comes from Icelandic eyja, from Old Norse ey, from Proto-Norse *ᚨᚢᛃᚢ, from Proto-Germanic awjō, from Proto-Germanic agwjō, from Proto-Indo-European h₂ékʷeh₂ — water.

Ancestry of “Jólaeyja”, step by step

Jólaeyja traces back through two separate lines of ancestry.

via Icelandic eyja

StepLanguageWordMeaning
1Icelandiceyjaisland
2Old Norseeyalways, ever; island
3Proto-Norse*ᚨᚢᛃᚢ—
4Proto-Germanicawjōfloodplain; meadow; island
5Proto-Germanicagwjō—
6Proto-Indo-Europeanh₂ékʷeh₂water

via Icelandic jól

StepLanguageWordMeaning
1IcelandicjólChristmas, Noel; Yule
2Old Norsejólyule, midwinter season
3Proto-Germanicjehwląfestivity, celebration; Yule
4Proto-Indo-Europeanyekə-joke, play
Every word from Proto-Indo-European h₂ékʷeh₂ →Every word from Proto-Germanic agwjō →Every word from Proto-Germanic awjō →