Where does “Aŭstino” come from?

Aŭstino (Esperanto) comes from English Austin, from Middle English Austin, from Anglo-Norman Aostin, from Latin Augustīnus, from Latin Augustus, from Proto-Indo-European h₂ewg-, from Proto-Indo-European h₂weg-, from Proto-Indo-European h₂ug-.

Ancestry of “Aŭstino”, step by step

Step	Language	Word	Meaning
1	English	Austin	Augustinian
2	Middle English	Austin	Augustine
3	Anglo-Norman	Aostin	—
4	Latin	Augustīnus	—
5	Latin	Augustus	venerable
6	Proto-Indo-European	h₂ewg-	to increase, to enlarge
7	Proto-Indo-European	h₂weg-	to increase, to enlarge
8	Proto-Indo-European	h₂ug-	—

Every word from Proto-Indo-European h₂ug- →

Aŭstino — Etymology, Origin & Word History | Etymology Explorer