The story
- Proto-Indo-European*h₁wes-
- Proto-Indo-European*h₁wésus?
- Proto-Indo-European*h₁es-?
- Proto-Indo-European*h₁su-
- Proto-Hellenic*ehu-
- Ancient Greekἐΰς (eǘs)
- Ancient Greekεὖ (eû)
- Ancient Greekεὐ- (eu-)
- Proto-Indo-European*tyegʷ-
- Proto-Indo-European*tyégʷ-e-tor
- Proto-Hellenic*tségʷomai
- Ancient Greekσέβομαι (sébomai)
- Ancient Greekεὐσεβής (eusebḗs)
- Ancient GreekΕὐσέβιος (Eusébios)
- LatinEusebiu
- English todayEusebius
Learned borrowing from Latin Eusebius, borrowed from Ancient Greek Εὐσέβιος (Eusébios), from εὐσεβής (eusebḗs) + -ῐος (-ĭos).
Etymology from Wiktionary, CC BY-SA 4.0.