Where does “Sebastian” come from?

Sebastian comes from Latin Sebastianus, a name derived from the Greek adjective sebastos meaning "venerable" or "worthy of reverence."

Ancestry of “Sebastian”, step by step

Step	Language	Word	Meaning
1	Latin	Sebastianus	—
2	Latin	Sebastus	—
3	Ancient Greek	Σεβαστός	august, venerable, exalted
4	Latin	Augustus	venerable
5	Proto-Indo-European	h₂ewg-	to increase, to enlarge
6	Proto-Indo-European	h₂weg-	to increase, to enlarge
7	Proto-Indo-European	h₂ug-	—

Sebastian — Etymology, Origin & Word History | Etymology Explorer